diff --git a/src/widget/yearmonth/trigger.yearmonth.js b/src/widget/yearmonth/trigger.yearmonth.js
index 1c062f7d5..fb947bff5 100644
--- a/src/widget/yearmonth/trigger.yearmonth.js
+++ b/src/widget/yearmonth/trigger.yearmonth.js
@@ -67,9 +67,10 @@ BI.DynamicYearMonthTrigger = BI.inherit(BI.Trigger, {
             type: "bi.sign_editor",
             height: o.height,
             validationChecker: function (v) {
-                if(isYear) {
-                    return v === "" || (BI.isPositiveInteger(v) && !BI.checkDateVoid(v, v === minDate.getFullYear() ? minDate.getMonth() + 1 : 1, 1, o.min, o.max)[0]);
+                if (isYear) {
+                    return v === "" || (BI.isPositiveInteger(v) && !BI.checkDateVoid(v, parseInt(v, 10) === minDate.getFullYear() ? minDate.getMonth() + 1 : 1, 1, o.min, o.max)[0]);
                 }
+
                 return v === "" || ((BI.isPositiveInteger(v) && v >= 1 && v <= 12) && !BI.checkDateVoid(BI.getDate().getFullYear(), v, 1, o.min, o.max)[0]);
             },
             quitChecker: function () {