diff --git a/src/controllers/inlineString.js b/src/controllers/inlineString.js
index 73b965d..d989f26 100644
--- a/src/controllers/inlineString.js
+++ b/src/controllers/inlineString.js
@@ -202,7 +202,7 @@ export function updateInlineStringFormat(cell, attr, value, $input){
     }
 }
 
-export function enterKeyControll(){
+export function enterKeyControll(cell){
     var  w = window.getSelection(); 
     
     if(w.type=="None"){
@@ -228,7 +228,12 @@ export function enterKeyControll(){
     
     if($textEditor.length>0){
         let startSpan = startContainer.parentNode;
-        let startSpanIndex = $textEditor.find("span").index(startSpan);
+        if(startContainer.id=="luckysheet-rich-text-editor"){
+            startSpan = $(startContainer).find("span");
+            startSpan = startSpan.get(startSpan.length-1);
+            startOffset = startSpan.innerHTML.length;
+        }
+        // let startSpanIndex = $textEditor.find("span").index(startSpan);
         if(range.collapsed===false){
             range.deleteContents();
         }
@@ -240,15 +245,48 @@ export function enterKeyControll(){
         sleft = startContent.substring(s1, s2);
         sright = startContent.substring(s2, startContent.length);
 
-        let cont = "<span style='"+ startSpan.style.cssText +"'>" + sleft + "\n" + sright + "</span>";
-        let spanIndex;
+        
+        let spanIndex,cont;
         if(startContainer.parentNode.tagName=="SPAN"){
-            spanIndex = $textEditor.find("span").index(startSpan);
+            let textSpan = $textEditor.find("span");
+            spanIndex = textSpan.index(startSpan);
+            if((spanIndex==textSpan.length-1) && sright==""){
+                let txt = textSpan[spanIndex].innerHTML;
+                if(txt.substr(txt.length-1, 1)=="\n"){
+                    cont = "<span style='"+ startSpan.style.cssText +"'>" + sleft + "\n" + "</span>";
+                }
+                else{
+                    cont = "<span style='"+ startSpan.style.cssText +"'>" + sleft + "\n\n" + "</span>";
+                }
+                
+            }
+            else{
+                cont = "<span style='"+ startSpan.style.cssText +"'>" + sleft + "\n" + sright + "</span>";
+            }
+            
             $(startSpan).replaceWith(cont);
         }
         else{
-            spanIndex = 0;
-            $(startSpan).html(cont);
+            
+            let cssText = getFontStyleByCell(cell);
+            if(sright==""){
+                cont = "<span style='"+ cssText +"'>" + sleft + "\n\n" + "</span>";
+            }
+            else{
+                cont = "<span style='"+ cssText +"'>" + sleft + "\n" + sright + "</span>";
+            }
+            
+            if(startContainer.id=="luckysheet-rich-text-editor"){
+                $(startSpan).replaceWith(cont);
+                let textSpan = $textEditor.find("span");
+                spanIndex = textSpan.length-1;
+                startOffset = textSpan.get(spanIndex).innerHTML.length-1;
+            }
+            else{
+                $(startSpan).html(cont);
+                spanIndex = 0;
+            }
+            
         }
 
         selectTextContentCollapse($textEditor.find("span").get(spanIndex), startOffset+1);
diff --git a/src/controllers/keyboard.js b/src/controllers/keyboard.js
index 5356c00..c000684 100644
--- a/src/controllers/keyboard.js
+++ b/src/controllers/keyboard.js
@@ -307,7 +307,9 @@ export function keyboardInitial(){
         let $inputbox = $("#luckysheet-input-box");
         
         if((altKey || event.metaKey) && kcode == keycode.ENTER && parseInt($inputbox.css("top")) > 0){
-            enterKeyControll();
+            let last = Store.luckysheet_select_save[Store.luckysheet_select_save.length - 1];
+            let row_index = last["row_focus"], col_index = last["column_focus"];
+            enterKeyControll(Store.flowdata[row_index][col_index]);
             event.preventDefault();
         }
         else if (kcode == keycode.ENTER && parseInt($inputbox.css("top")) > 0) {
diff --git a/src/global/cursorPos.js b/src/global/cursorPos.js
index c01209e..29fd6a7 100644
--- a/src/global/cursorPos.js
+++ b/src/global/cursorPos.js
@@ -64,8 +64,10 @@ function selectTextDom(ele){
     if (window.getSelection) {
         let range = document.createRange();
         range.selectNodeContents(ele);
-        window.getSelection().removeAllRanges();
-        window.getSelection().addRange(range);
+        if(range.startContainer && isInPage(range.startContainer)){
+            window.getSelection().removeAllRanges();
+            window.getSelection().addRange(range);
+        }
     }
     else if (document.selection) {
         let range = document.body.createTextRange();
@@ -80,8 +82,10 @@ function selectTextContent(ele){
         var content=ele.firstChild;
         range.setStart(content,0);
         range.setEnd(content,content.length);
-        window.getSelection().removeAllRanges();
-        window.getSelection().addRange(range);
+        if(range.startContainer && isInPage(range.startContainer)){
+            window.getSelection().removeAllRanges();
+            window.getSelection().addRange(range);
+        }
     }
     else if (document.selection) {
         let range = document.body.createTextRange();
@@ -96,8 +100,10 @@ function selectTextContentCross(sEle, eEle){
         var sContent=sEle.firstChild, eContent=eEle.firstChild;
         range.setStart(sContent,0);
         range.setEnd(eContent,eContent.length);
-        window.getSelection().removeAllRanges();
-        window.getSelection().addRange(range);
+        if(range.startContainer && isInPage(range.startContainer)){
+            window.getSelection().removeAllRanges();
+            window.getSelection().addRange(range);
+        }
     }
 }
 
@@ -105,13 +111,26 @@ function selectTextContentCollapse(sEle, index){
     if (window.getSelection) {
         let range = document.createRange();
         var sContent=sEle.firstChild;
+        if(index>sContent.length){
+            index=sContent.length;
+        }
+        else if(index<0){
+            index = 0;
+        }
         range.setStart(sContent,index);
         range.collapse(true);
-        window.getSelection().removeAllRanges();
-        window.getSelection().addRange(range);
+        if(range.startContainer && isInPage(range.startContainer)){
+            window.getSelection().removeAllRanges();
+            window.getSelection().addRange(range);
+        }
+
     }
 }
 
+function isInPage(node) {
+    return (node === document.body) ? false : document.body.contains(node);
+}
+
 export {
     luckysheetRangeLast,
     getCursortPosition,
diff --git a/src/global/formula.js b/src/global/formula.js
index ae18fba..ca3deea 100644
--- a/src/global/formula.js
+++ b/src/global/formula.js
@@ -888,14 +888,16 @@ const luckysheetformula = {
         let $cell = _this.getrangeseleciton();
         _this.searchFunctionCell = $cell;
 
+        
+
         if ($cell == null || $editer == null) {
             return;
         }
-
+        let inputContent = $editer.text();
         let searchtxt = $cell.text().toUpperCase();
         let reg = /^[a-zA-Z]|[a-zA-Z_]+$/;
         
-        if (!reg.test(searchtxt)) {
+        if (!reg.test(searchtxt) || inputContent.substr(0, 1)!="=") {
             return;
         }
 
diff --git a/src/global/getRowlen.js b/src/global/getRowlen.js
index 82aee2c..3dcb276 100644
--- a/src/global/getRowlen.js
+++ b/src/global/getRowlen.js
@@ -338,7 +338,7 @@ function getCellTextInfo(cell , ctx, option){
             for(let x=0;x<splitArr.length;x++){
                 let newValue = splitArr[x];
                 
-                if(newValue==""){
+                if(newValue=="" && x!=splitArr.length-1){
                     inlineStringArr.push({
                         fontset:scfontset,
                         fc:fc==null?"#000":fc,
@@ -366,7 +366,7 @@ function getCellTextInfo(cell , ctx, option){
                         
                     }
 
-                    if(x!=splitArr.length-1 && !(preNewValue=="" && newValue=="") ){
+                    if(x!=splitArr.length-1 && preNewValue!="" ){
                         inlineStringArr.push({
                             fontset:scfontset,
                             fc:fc==null?"#000":fc,