diff --git a/backend/services/connection_service.go b/backend/services/connection_service.go
index 86d6ad5..41c332c 100644
--- a/backend/services/connection_service.go
+++ b/backend/services/connection_service.go
@@ -179,7 +179,7 @@ func (c *connectionService) OpenConnection(name string) (resp types.JSResp) {
 		return
 	}
 
-	// get total database
+	// get total databases
 	config, err := rdb.ConfigGet(ctx, "databases").Result()
 	if err != nil {
 		resp.Msg = err.Error()
@@ -347,12 +347,12 @@ func (c *connectionService) ServerInfo(name string) (resp types.JSResp) {
 
 // OpenDatabase open select database, and list all keys
 // @param path contain connection name and db name
-func (c *connectionService) OpenDatabase(connName string, db int) (resp types.JSResp) {
-	return c.ScanKeys(connName, db, "*")
+func (c *connectionService) OpenDatabase(connName string, db int, match string) (resp types.JSResp) {
+	return c.ScanKeys(connName, db, match)
 }
 
-// ScanKeys scan all keys below prefix
-func (c *connectionService) ScanKeys(connName string, db int, prefix string) (resp types.JSResp) {
+// ScanKeys scan all keys
+func (c *connectionService) ScanKeys(connName string, db int, match string) (resp types.JSResp) {
 	rdb, ctx, err := c.getRedisClient(connName, db)
 	if err != nil {
 		resp.Msg = err.Error()
@@ -364,7 +364,7 @@ func (c *connectionService) ScanKeys(connName string, db int, prefix string) (re
 	var cursor uint64
 	for {
 		var loadedKey []string
-		loadedKey, cursor, err = rdb.Scan(ctx, cursor, prefix, 10000).Result()
+		loadedKey, cursor, err = rdb.Scan(ctx, cursor, match, 10000).Result()
 		if err != nil {
 			resp.Msg = err.Error()
 			return
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 22643e7..5832723 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -17,6 +17,7 @@ import usePreferencesStore from './stores/preferences.js'
 import useConnectionStore from './stores/connections.js'
 import { useI18n } from 'vue-i18n'
 import { darkTheme, lightTheme, useOsTheme } from 'naive-ui'
+import KeyFilterDialog from './components/dialogs/KeyFilterDialog.vue'
 
 hljs.registerLanguage('json', json)
 hljs.registerLanguage('plaintext', plaintext)
@@ -95,6 +96,7 @@ const theme = computed(() => {
                 <connection-dialog />
                 <group-dialog />
                 <new-key-dialog />
+                <key-filter-dialog />
                 <add-fields-dialog />
                 <rename-key-dialog />
                 <delete-key-dialog />
diff --git a/frontend/src/components/dialogs/KeyFilterDialog.vue b/frontend/src/components/dialogs/KeyFilterDialog.vue
new file mode 100644
index 0000000..d6a84b5
--- /dev/null
+++ b/frontend/src/components/dialogs/KeyFilterDialog.vue
@@ -0,0 +1,91 @@
+<script setup>
+import { reactive, ref, watch } from 'vue'
+import useDialog from '../../stores/dialog'
+import { useI18n } from 'vue-i18n'
+import useConnectionStore from '../../stores/connections.js'
+
+const i18n = useI18n()
+const filterForm = reactive({
+    server: '',
+    db: 0,
+    pattern: '',
+})
+const filterFormRef = ref(null)
+
+const formLabelWidth = '100px'
+const dialogStore = useDialog()
+watch(
+    () => dialogStore.keyFilterDialogVisible,
+    (visible) => {
+        if (visible) {
+            const { server, db, pattern } = dialogStore.keyFilterParam
+            filterForm.server = server
+            filterForm.db = db || 0
+            filterForm.pattern = pattern || '*'
+        }
+    }
+)
+
+const connectionStore = useConnectionStore()
+const onConfirm = () => {
+    const { server, db, pattern } = filterForm
+    connectionStore.setKeyFilter(server, db, pattern)
+    connectionStore.reopenDatabase(server, db)
+}
+
+const onClose = () => {
+    dialogStore.closeKeyFilterDialog()
+}
+</script>
+
+<template>
+    <n-modal
+        v-model:show="dialogStore.keyFilterDialogVisible"
+        :closable="false"
+        :close-on-esc="false"
+        :mask-closable="false"
+        :negative-button-props="{ size: 'medium' }"
+        :negative-text="$t('cancel')"
+        :positive-button-props="{ size: 'medium' }"
+        :positive-text="$t('confirm')"
+        :show-icon="false"
+        :title="$t('set_key_filter')"
+        preset="dialog"
+        style="width: 450px"
+        transform-origin="center"
+        @positive-click="onConfirm"
+        @negative-click="onClose"
+    >
+        <n-form
+            ref="filterFormRef"
+            :label-width="formLabelWidth"
+            :model="filterForm"
+            :show-require-mark="false"
+            label-align="right"
+            label-placement="left"
+            style="padding-right: 15px"
+        >
+            <n-form-item :label="$t('server')" path="key">
+                <n-text>{{ filterForm.server }}</n-text>
+            </n-form-item>
+            <n-form-item :label="$t('db_index')" path="db">
+                <n-text>{{ filterForm.db }}</n-text>
+            </n-form-item>
+            <n-form-item :label="$t('filter_pattern')" required>
+                <n-input-group>
+                    <n-tooltip>
+                        <template #trigger>
+                            <n-input v-model:value="filterForm.pattern" placeholder="Filter Pattern" clearable />
+                        </template>
+                        <div class="text-block">{{ $t('filter_pattern_tip') }}</div>
+                    </n-tooltip>
+                    <n-button secondary type="primary" @click="filterForm.pattern = '*'">
+                        {{ $t('restore_defaults') }}
+                    </n-button>
+                </n-input-group>
+            </n-form-item>
+        </n-form>
+    </n-modal>
+</template>
+
+<style lang="scss" scoped></style>
diff --git a/frontend/src/components/sidebar/BrowserTree.vue b/frontend/src/components/sidebar/BrowserTree.vue
index 44699bd..013c716 100644
--- a/frontend/src/components/sidebar/BrowserTree.vue
+++ b/frontend/src/components/sidebar/BrowserTree.vue
@@ -1,10 +1,10 @@
 <script setup>
 import { computed, h, nextTick, onMounted, reactive, ref } from 'vue'
 import { ConnectionType } from '../../consts/connection_type.js'
-import { NIcon, useDialog, useMessage } from 'naive-ui'
+import { NIcon, NTag, useDialog, useMessage } from 'naive-ui'
 import Key from '../icons/Key.vue'
 import ToggleDb from '../icons/ToggleDb.vue'
-import { get, indexOf, isEmpty } from 'lodash'
+import { get, indexOf, isEmpty, remove } from 'lodash'
 import { useI18n } from 'vue-i18n'
 import Refresh from '../icons/Refresh.vue'
 import CopyLink from '../icons/CopyLink.vue'
@@ -18,6 +18,8 @@ import useConnectionStore from '../../stores/connections.js'
 import { useConfirmDialog } from '../../utils/confirm_dialog.js'
 import ToggleServer from '../icons/ToggleServer.vue'
 import Unlink from '../icons/Unlink.vue'
+import Filter from '../icons/Filter.vue'
+import Close from '../icons/Close.vue'
 
 const props = defineProps({
     server: String,
@@ -86,6 +88,20 @@ const menuOptions = {
                     label: i18n.t('new_key'),
                     icon: renderIcon(Add),
                 },
+                {
+                    key: 'db_filter',
+                    label: i18n.t('filter_key'),
+                    icon: renderIcon(Filter),
+                },
+                {
+                    type: 'divider',
+                    key: 'd1',
+                },
+                {
+                    key: 'db_close',
+                    label: i18n.t('close_db'),
+                    icon: renderIcon(Close),
+                },
             ]
         } else {
             return [
@@ -261,6 +277,26 @@ const renderSuffix = ({ option }) => {
     // return h(NButton,
     //     { text: true, type: 'primary' },
     //     { default: () => h(Key) })
+    if (option.type === ConnectionType.RedisDB) {
+        const { name: server, db } = option
+        const filterPattern = connectionStore.getKeyFilter(server, db)
+        if (!isEmpty(filterPattern) && filterPattern !== '*') {
+            return h(
+                NTag,
+                {
+                    bordered: false,
+                    closable: true,
+                    size: 'small',
+                    onClose: () => {
+                        connectionStore.removeKeyFilter(server, db)
+                        connectionStore.reopenDatabase(server, db)
+                    },
+                },
+                { default: () => filterPattern }
+            )
+        }
+    }
+    return null
 }
 
 const nodeProps = ({ option }) => {
@@ -334,10 +370,18 @@ const handleSelectContextMenu = (key) => {
         case 'db_reload':
             connectionStore.reopenDatabase(props.server, db)
             break
+        case 'db_close':
+            remove(expandedKeys.value, (k) => k === `${props.server}/db${db}`)
+            connectionStore.closeDatabase(props.server, db)
+            break
         case 'db_newkey':
         case 'key_newkey':
             dialogStore.openNewKeyDialog(redisKey, props.server, db)
             break
+        case 'db_filter':
+            const pattern = connectionStore.getKeyFilter(props.server, db)
+            dialogStore.openKeyFilterDialog(props.server, db, pattern)
+            break
         case 'key_reload':
             connectionStore.loadKeys(props.server, db, redisKey)
             break
diff --git a/frontend/src/langs/en.json b/frontend/src/langs/en.json
index bf01f8b..5971e3f 100644
--- a/frontend/src/langs/en.json
+++ b/frontend/src/langs/en.json
@@ -39,7 +39,8 @@
   "view_as": "View As",
   "reload": "Reload",
   "open_connection": "Open Connection",
-  "open_db": "Expand Database",
+  "open_db": "Open Database",
+  "close_db": "Close Database",
   "filter_key": "Filter Keys",
   "disconnect": "Disconnect",
   "dup_conn": "Duplicate Connection",
@@ -94,6 +95,10 @@
   "enter_elem": "Enter Element",
   "enter_member": "Enter Member",
   "enter_score": "Enter Score",
+  "element": "Element",
+  "set_key_filter": "Set Key Filter",
+  "filter_pattern": "Pattern",
+  "filter_pattern_tip": "prefix_*: Matches key names starting with \"prefix_\".\n*_suffix: Matches key names ending with \"_suffix\".\n*pattern*: Matches key names containing \"pattern\".\nprefix_??: Matches key names starting with \"prefix_\" followed by any two characters.\n*abc*: Matches key names containing \"abc\" at any position.",
   "key": "Key",
   "value": "Value",
   "field": "Field",
diff --git a/frontend/src/langs/zh-cn.json b/frontend/src/langs/zh-cn.json
index 2065f14..dce9dd1 100644
--- a/frontend/src/langs/zh-cn.json
+++ b/frontend/src/langs/zh-cn.json
@@ -41,7 +41,8 @@
   "view_as": "查看方式",
   "reload": "重新载入",
   "open_connection": "打开连接",
-  "open_db": "展开数据库",
+  "open_db": "打开数据库",
+  "close_db": "关闭数据库",
   "filter_key": "过滤键",
   "disconnect": "断开连接",
   "dup_conn": "复制连接",
@@ -97,6 +98,9 @@
   "enter_member": "输入成员",
   "enter_score": "输入分值",
   "element": "元素",
+  "set_key_filter": "设置键过滤器",
+  "filter_pattern": "过滤表达式",
+  "filter_pattern_tip": "prefix_*：匹配以\"prefix_\"开头的键名\n*_suffix：匹配以\"_suffix\"结尾的键名\n*pattern*：匹配包含\"pattern\"的键名\nprefix_??：匹配以\"prefix_\"开头后跟两个任意字符的键名\n*abc*：匹配包含\"abc\"的任意位置的键名",
   "key": "键",
   "value": "值",
   "field": "字段",
diff --git a/frontend/src/stores/connections.js b/frontend/src/stores/connections.js
index c75291b..366a993 100644
--- a/frontend/src/stores/connections.js
+++ b/frontend/src/stores/connections.js
@@ -59,7 +59,9 @@ const useConnectionStore = defineStore('connections', {
      * @typedef {Object} ConnectionState
      * @property {string[]} groups
      * @property {ConnectionItem[]} connections
+     * @property {Object} serverStats
      * @property {Object.<string, ConnectionProfile>} serverProfile
+     * @property {Object.<string, string>} keyFilter key is 'server#db', 'server#-1' stores default filter pattern
      * @property {Object.<string, DatabaseItem[]>} databases
      * @property {Object.<string, Map<string, DatabaseItem>>} nodeMap key format likes 'server#db', children key format likes 'key#type'
      */
@@ -87,8 +89,9 @@ const useConnectionStore = defineStore('connections', {
         connections: [], // all connections
         serverStats: {}, // current server status info
         serverProfile: {}, // all server profile
+        keyFilter: {}, // all key filters in opened connections group by server+db
         databases: {}, // all databases in opened connections group by server name
-        nodeMap: {}, // all node in opened connections group by server+db and key+type
+        nodeMap: {}, // all nodes in opened connections group by server#db and type/key
     }),
     getters: {
         anyConnectionOpened() {
@@ -151,6 +154,7 @@ const useConnectionStore = defineStore('connections', {
                         markColor: conn.markColor,
                     }
                 }
+                this.setKeyFilter(conn.name, -1, conn.defaultFilter)
             }
             this.connections = conns
             this.serverProfile = profiles
@@ -333,8 +337,10 @@ const useConnectionStore = defineStore('connections', {
 
             const dbs = this.databases[name]
             for (const db of dbs) {
-                this.nodeMap[`${db.name}#${db.db}`]?.clear()
+                this.removeKeyFilter(name, db.db)
+                this.nodeMap[`${name}#${db.db}`]?.clear()
             }
+            this.removeKeyFilter(name, -1)
             delete this.databases[name]
             delete this.serverStats[name]
 
@@ -428,7 +434,8 @@ const useConnectionStore = defineStore('connections', {
          * @returns {Promise<void>}
          */
         async openDatabase(connName, db) {
-            const { data, success, msg } = await OpenDatabase(connName, db)
+            const filterPattern = this.getKeyFilter(connName, db)
+            const { data, success, msg } = await OpenDatabase(connName, db, filterPattern)
             if (!success) {
                 throw new Error(msg)
             }
@@ -459,6 +466,20 @@ const useConnectionStore = defineStore('connections', {
             this.nodeMap[`${connName}#${db}`]?.clear()
         },
 
+        /**
+         * close database
+         * @param connName
+         * @param db
+         */
+        closeDatabase(connName, db) {
+            const dbs = this.databases[connName]
+            delete dbs[db].children
+            dbs[db].isLeaf = false
+            dbs[db].opened = false
+
+            this.nodeMap[`${connName}#${db}`]?.clear()
+        },
+
         /**
          *
          * @param server
@@ -1224,6 +1245,34 @@ const useConnectionStore = defineStore('connections', {
                 return []
             }
         },
+
+        /**
+         * get key filter pattern
+         * @param {string} server
+         * @param {number} db
+         * @returns {string}
+         */
+        getKeyFilter(server, db) {
+            const key = `${server}#${db}`
+            if (!this.keyFilter.hasOwnProperty(key)) {
+                return this.keyFilter[`${server}#-1`] || '*'
+            }
+            return this.keyFilter[key] || '*'
+        },
+
+        /**
+         * set key filter
+         * @param {string} server
+         * @param {number} db
+         * @param {string} pattern
+         */
+        setKeyFilter(server, db, pattern) {
+            this.keyFilter[`${server}#${db}`] = pattern || '*'
+        },
+
+        removeKeyFilter(server, db) {
+            this.keyFilter[`${server}#${db}`] = '*'
+        },
     },
 })
 
diff --git a/frontend/src/stores/dialog.js b/frontend/src/stores/dialog.js
index f50dc06..da7e8dd 100644
--- a/frontend/src/stores/dialog.js
+++ b/frontend/src/stores/dialog.js
@@ -21,6 +21,13 @@ const useDialogStore = defineStore('dialog', {
         },
         newKeyDialogVisible: false,
 
+        keyFilterParam: {
+            server: '',
+            db: 0,
+            pattern: '*',
+        },
+        keyFilterDialogVisible: false,
+
         addFieldParam: {
             server: '',
             db: 0,
@@ -74,6 +81,26 @@ const useDialogStore = defineStore('dialog', {
             this.groupDialogVisible = false
         },
 
+        /**
+         *
+         * @param {string} server
+         * @param {number} db
+         * @param {string} pattern
+         */
+        openKeyFilterDialog(server, db, pattern) {
+            this.keyFilterParam.server = server
+            this.keyFilterParam.db = db
+            this.keyFilterParam.pattern = '*'
+            this.keyFilterDialogVisible = true
+        },
+        closeKeyFilterDialog() {
+            this.keyFilterDialogVisible = false
+        },
+
+        /**
+         *
+         * @param {string} name
+         */
         openRenameGroupDialog(name) {
             this.editGroup = name
             this.groupDialogVisible = true