diff --git a/packages/fineui/src/widget/intervalslider/intervalslider.js b/packages/fineui/src/widget/intervalslider/intervalslider.js
index f3a1c4aff..afd1919f3 100644
--- a/packages/fineui/src/widget/intervalslider/intervalslider.js
+++ b/packages/fineui/src/widget/intervalslider/intervalslider.js
@@ -59,6 +59,10 @@ export class IntervalSlider extends Single {
         this.populate();
     }
 
+    getConstant() {
+        return CONSTANTS;
+    }
+
     render() {
         const o = this.options;
         this.enable = false;
@@ -85,7 +89,7 @@ export class IntervalSlider extends Single {
             text: unit,
             allowBlank: false,
             textAlign: lAlign,
-            width: BI.isNull(editorWidth) ? BI.toPix(CONSTANTS.EDITOR_WIDTH, 2) : BI.toPix(editorWidth, 2),
+            width: isNull(editorWidth) ? toPix(CONSTANTS.EDITOR_WIDTH, 2) : toPix(editorWidth, 2),
             height: toPix(CONSTANTS.EDITOR_HEIGHT, 2),
             validationChecker: v => this._checkValidation(v),
         });
@@ -115,7 +119,7 @@ export class IntervalSlider extends Single {
             text: unit,
             allowBlank: false,
             textAlign: rAlign,
-            width: BI.isNull(editorWidth) ? BI.toPix(CONSTANTS.EDITOR_WIDTH, 2) : BI.toPix(editorWidth, 2),
+            width: isNull(editorWidth) ? toPix(CONSTANTS.EDITOR_WIDTH, 2) : toPix(editorWidth, 2),
             height: toPix(CONSTANTS.EDITOR_HEIGHT, 2),
             validationChecker: v => this._checkValidation(v),
         });
@@ -384,18 +388,27 @@ export class IntervalSlider extends Single {
         }
     }
 
+    // 别删，历史原因，定时调度不能用 parentElement.children 函数
+    _getElementFirstChild() {
+        return parentElement.children()[0]
+    }
+
     _resetLabelPosition(needReverse) {
         const { lAlign, rAlign } = this.options;
+
         this.labelOne.element.css({
             left: needReverse ? "unset" : "0%",
             right: needReverse ? "0%" : "unset",
         });
-        this.labelOne.element.children()[0] && (this.labelOne.element.children()[0].style.textAlign = needReverse ? rAlign : lAlign);
+        this._getElementFirstChild(this.labelOne.element)
+            ?.labelOneChild.css({ textAlign: needReverse ? rAlign : lAlign });
+
         this.labelTwo.element.css({
-        left: needReverse ? "0%" : "unset",
-        right: needReverse ? "unset" : "0%",
+            left: needReverse ? "0%" : "unset",
+            right: needReverse ? "unset" : "0%",
         });
-        this.labelTwo.element.children()[0] && (this.labelTwo.element.children()[0].style.textAlign = needReverse ? lAlign : rAlign);
+        this._getElementFirstChild(this.labelTwo.element)
+            ?.css({ textAlign: needReverse ? lAlign : rAlign });
     }
 
     _setSliderOnePosition(percent) {