diff --git a/src/controllers/keyboard.js b/src/controllers/keyboard.js
index b89cd45..80a5263 100644
--- a/src/controllers/keyboard.js
+++ b/src/controllers/keyboard.js
@@ -856,8 +856,11 @@ export function keyboardInitial(){
             formulaMoveEvent("right", ctrlKey, shiftKey,event);
         }
         else if (!((kcode >= 112 && kcode <= 123) || kcode <= 46 || kcode == 144 || kcode == 108 || event.ctrlKey || event.altKey || (event.shiftKey && (kcode == 37 || kcode == 38 || kcode == 39 || kcode == 40 || kcode == keycode.WIN || kcode == keycode.WIN_R || kcode == keycode.MENU))) || kcode == 8 || kcode == 32 || kcode == 46 || (event.ctrlKey && kcode == 86)) {
-            formula.functionInputHanddler($("#luckysheet-functionbox-cell"), $("#luckysheet-rich-text-editor"), kcode);
-            setCenterInputPosition(Store.luckysheetCellUpdate[0], Store.luckysheetCellUpdate[1], Store.flowdata);
+            if(event.target.id!="luckysheet-input-box" && event.target.id!="luckysheet-rich-text-editor"){
+                formula.functionInputHanddler($("#luckysheet-functionbox-cell"), $("#luckysheet-rich-text-editor"), kcode);
+                setCenterInputPosition(Store.luckysheetCellUpdate[0], Store.luckysheetCellUpdate[1], Store.flowdata);
+            }
+            
         }
     }).keyup(function (e) {
         let kcode = e.keyCode;
diff --git a/src/global/formula.js b/src/global/formula.js
index deb5480..5f3ce09 100644
--- a/src/global/formula.js
+++ b/src/global/formula.js
@@ -3238,7 +3238,7 @@ const luckysheetformula = {
             let value = $editer.text(),
                 valuetxt = value;
 
-            if (value.length > 0 && !(value1txt.substr(0, 1) != "=" && value1.indexOf("span")>-1) && (kcode != 229 || value.length == 1)) {
+            if (value.length > 0 && value1txt.substr(0, 1) == "=" && (kcode != 229 || value.length == 1)) {
                 value = _this.functionHTMLGenerate(value);
                 value1 = _this.functionHTMLGenerate(value1txt);
 
@@ -3266,10 +3266,31 @@ const luckysheetformula = {
                 }
 
                 $functionbox.html(value);
+
+
             }
-            else if(value1txt.substr(0, 1) != "=" && value1.indexOf("span")>-1){
+            else if(value1txt.substr(0, 1) != "="  && (kcode != 229 || value.length == 1)){
+                //&& value1.indexOf("span")>-1
                 // $editer.html(value1);
-                $functionbox.html(value);
+                let w = window.getSelection();
+                if(w!=null && w.type!="None"){
+                    let range = w.getRangeAt(0);
+                    let c = range.startContainer;
+
+                    if(c.id=="luckysheet-rich-text-editor" || $(c).closest("#luckysheet-rich-text-editor")){
+                        $functionbox.html(value);
+                    }
+                    else if(c.id=="luckysheet-functionbox-cell" || $(c).closest("#luckysheet-functionbox-cell")){
+                        if(value1.indexOf("span")>-1){
+
+                        }
+                        else{
+                            $editer.html(value);
+                        }
+                    }
+                    
+                }
+                
             }
 
             _this.rangestart = false;