diff --git a/packages/uni-components/lib/unicloud-db/unicloud-db.vue b/packages/uni-components/lib/unicloud-db/unicloud-db.vue
index 801d7bc45d07f6dad1a36c9471d5ddae3673d10d..aa05712faa9d761eb67bc7565d337ad25a105907 100644
--- a/packages/uni-components/lib/unicloud-db/unicloud-db.vue
+++ b/packages/uni-components/lib/unicloud-db/unicloud-db.vue
@@ -77,7 +77,7 @@ export default {
       }
     },
     collection: {
-      type: String,
+      type: [String, Array],
       default: ''
     },
     action: {
@@ -172,6 +172,21 @@ export default {
       errorMessage: ''
     }
   },
+  computed: {
+    collectionArgs () {
+      return Array.isArray(this.collection) ? this.collection : [this.collection]
+    },
+    isLookup () {
+      return (Array.isArray(this.collection) && this.collection.length > 1) || (typeof this.collection === 'string' && this.collection.indexOf(',') > -1)
+    },
+    mainCollection () {
+      if (typeof this.collection === 'string') {
+        return this.collection.split(',')[0]
+      }
+      const mainQuery = JSON.parse(JSON.stringify(this.collection[0]))
+      return mainQuery.$db[0].$param[0]
+    }
+  },
   created() {
     this._isEnded = false
     this.paginationInternal = {
@@ -319,7 +334,7 @@ export default {
         db = db.action(action)
       }
 
-      db.collection(this._getCollection()).add(value).then((res) => {
+      db.collection(this.mainCollection).add(value).then((res) => {
         success && success(res)
         if (showToast) {
           uni.showToast({
@@ -393,7 +408,7 @@ export default {
         db = db.action(action)
       }
 
-      return db.collection(this._getCollection()).doc(id).update(value).then((res) => {
+      return db.collection(this.mainCollection).doc(id).update(value).then((res) => {
         success && success(res)
         if (showToast) {
           uni.showToast({
@@ -415,52 +430,7 @@ export default {
         complete && complete()
       })
     },
-    _execLoadData(callback, clear) {
-      if (this.loading) {
-        return
-      }
-      this.loading = true
-      this.errorMessage = ''
-
-      return this._getExec().then((res) => {
-        this.loading = false
-        const {
-          data,
-          count
-        } = res.result
-        this._isEnded = count !== undefined ? (this.paginationInternal.current * this.paginationInternal.size >= count) : (data.length < this.pageSize)
-        this.hasMore = !this._isEnded
-
-        const data2 = this.getone ? (data.length ? data[0] : undefined) : data
-
-        if (this.getcount) {
-          this.paginationInternal.count = count
-        }
-
-        callback && callback(data2, this._isEnded, this.paginationInternal)
-        this._dispatchEvent(events.load, data2)
-
-        if (this.getone || this.pageData === pageMode.replace) {
-          this.dataList = data2
-        } else {
-          if (clear) {
-            this.dataList = data2
-          } else {
-            this.dataList.push(...data2)
-          }
-        }
-
-      }).catch((err) => {
-        this.loading = false
-        this.errorMessage = err
-        callback && callback()
-        this.$emit(events.error, err)
-        if (process.env.NODE_ENV === 'development') {
-          console.error(err)
-        }
-      })
-    },
-    _getExec() {
+    getTemp(isTemp = true) {
       /* eslint-disable no-undef */
       let db = uniCloud.database()
 
@@ -468,7 +438,7 @@ export default {
         db = db.action(this.action)
       }
 
-      db = db.collection(this.collection)
+      db = db.collection(...this.collectionArgs)
 
       if (!(!this.where || !Object.keys(this.where).length)) {
         db = db.where(this.where)
@@ -510,10 +480,77 @@ export default {
       if (this.gettreepath) {
         getOptions.getTreePath = treeOptions
       }
-      db = db.skip(size * (current - 1)).limit(size).get(getOptions)
+      db = db.skip(size * (current - 1)).limit(size)
+
+      if (isTemp) {
+        db = db.getTemp(getOptions)
+        db.udb = this
+      } else {
+        db = db.get(getOptions)
+      }
 
       return db
     },
+    setResult(result) {
+      if (result.code === 0) {
+        this._execLoadDataSuccess(result)
+      } else {
+        this._execLoadDataFail(new Error(result.message))
+      }
+    },
+    _execLoadData(callback, clear) {
+      if (this.loading) {
+        return
+      }
+      this.loading = true
+      this.errorMessage = ''
+
+      return this._getExec().then((res) => {
+        this.loading = false
+        this._execLoadDataSuccess(res.result, callback, clear)
+      }).catch((err) => {
+        this.loading = false
+        this._execLoadDataFail(err, callback)
+      })
+    },
+    _execLoadDataSuccess(result, callback, clear) {
+      const {
+        data,
+        count
+      } = result
+      this._isEnded = count !== undefined ? (this.paginationInternal.current * this.paginationInternal.size >= count) : (data.length < this.pageSize)
+      this.hasMore = !this._isEnded
+
+      const data2 = this.getone ? (data.length ? data[0] : undefined) : data
+
+      if (this.getcount) {
+        this.paginationInternal.count = count
+      }
+
+      callback && callback(data2, this._isEnded, this.paginationInternal)
+      this._dispatchEvent(events.load, data2)
+
+      if (this.getone || this.pageData === pageMode.replace) {
+        this.dataList = data2
+      } else {
+        if (clear) {
+          this.dataList = data2
+        } else {
+          this.dataList.push(...data2)
+        }
+      }
+    },
+    _execLoadDataFail(err, callback) {
+      this.errorMessage = err
+      callback && callback()
+      this.$emit(events.error, err)
+      if (process.env.NODE_ENV === 'development') {
+        console.error(err)
+      }
+    },
+    _getExec() {
+      return this.getTemp(false)
+    },
     _execRemove(id, action, success, fail, complete, needConfirm, needLoading, loadingTitle) {
       if (!this.collection || !id) {
         return
@@ -540,7 +577,7 @@ export default {
         exec = exec.action(action)
       }
 
-      exec.collection(this._getCollection()).where({
+      exec.collection(this.mainCollection).where({
         _id: dbCmd.in(ids)
       }).remove().then((res) => {
         success && success(res.result)
@@ -564,11 +601,6 @@ export default {
         complete && complete()
       })
     },
-    _getCollection() {
-      const index = this.collection.indexOf(',')
-      const collection = index > 0 ? this.collection.substring(0, index) : this.collection
-      return collection
-    },
     removeData(ids) {
       const il = ids.slice(0)
       const dl = this.dataList