diff --git a/YLErpWeb/Views/credit/creditEdit.cshtml b/YLErpWeb/Views/credit/creditEdit.cshtml
index 9ff43b13..b074c6a7 100644
--- a/YLErpWeb/Views/credit/creditEdit.cshtml
+++ b/YLErpWeb/Views/credit/creditEdit.cshtml
@@ -60,6 +60,14 @@
                 changeFormCredit(Number(moneytemp).toFixed(2) + "");
             }
 
+            //授信可用比例默认填1;授信额度置灰,按 原始授信值×最大授信可用比例 联动计算
+            if (!$("#MaxCreditUseRatio").val()) {
+                $("#MaxCreditUseRatio").val("1");
+            }
+            $("#OriginalCredit").on("input change", calcCreditByRatio);
+            $("#MaxCreditUseRatio").on("input change", calcCreditByRatio);
+            calcCreditByRatio();
+
             //$('#Credit').keyup(function () {
             //    changePrice();
             //});
@@ -134,6 +142,19 @@
             }
         }
 
+        //授信额度 = 原始授信值 × 最大授信可用比例(空白按1);原始授信值为空时不折算,保留原授信额度
+        function calcCreditByRatio() {
+            var original = $("#OriginalCredit").val();
+            if (original == null || original == "") {
+                return;
+            }
+            var ratio = $("#MaxCreditUseRatio").val();
+            var money = (Number(original.replace(/,/g, "")) * (ratio == "" ? 1 : Number(ratio))).toFixed(2);
+            $("#Credit").val(money);
+            $("#CreditVal").val(money);
+            changeFormCredit(money);
+        }
+
         function checkSubmitData() {
             var pass = $('#creditEditForm').valid();
             if (pass) {
@@ -416,11 +437,11 @@
     </div>
         }
 
-    @Html.MyDecimalFor(model => model.Credit, new { onfocus = "moneyOnFocus()", onblur = "this.value=cc(this.value);" }, !pageObj.UseClientStockEqvNotional)
+    @Html.MyDecimalFor(model => model.Credit, new { @readonly = "readonly", style = "background-color:#eee;" }, !pageObj.UseClientStockEqvNotional)
     <input type="hidden" value="@Model.Credit" name="CreditVal" id="CreditVal" />
     @Html.MyDecimalFor(model => model.OriginalCredit, new { onfocus = "moneyOnFocusOriginalCredit()", onblur = "this.value=cc(this.value);" }, required: false)
     @Html.MyDecimalFor(model => model.MaxCreditUseRatio, required: false)
-    <span style="color:red">注:填写原始授信值后,授信额度将按"原始授信值×最大授信可用比例(空白按1)"自动计算.</span>
+    <span style="color:red">注:授信额度按"原始授信值×最大授信可用比例(默认1)"自动计算,无需填写;原始授信值为空时不折算,保留原授信额度.</span>
     @if (PS.Config.Company == CompanyEnum.中金)
     {
     @Html.MyDecimalFor(model => model.PFECredit, new { onkeyup = "changePFECredit()", onfocus = "pfeCreditOnFocus()", onblur = "this.value=cc(this.value);" }, true)