diff --git a/src/app/pages/historical-data/historical-data.component.html b/src/app/pages/historical-data/historical-data.component.html
index f4f3d2a..30d9c99 100644
--- a/src/app/pages/historical-data/historical-data.component.html
+++ b/src/app/pages/historical-data/historical-data.component.html
@@ -3,7 +3,7 @@
         <div class="search-filter mb-3" #searchFilter>
             <div class="first-condition row">
                 <div class="line-operator-left input-container mb-3 col-xlg-8 col-mlg-8 col-xl-8 col-lg-10">
-                    <select [(ngModel)]="SEL_COL" class="mr-4 form-control" name="" id="">
+                    <select [(ngModel)]="SEL_COL" class="mr-4 form-control" (ngModelChange)="resetPositionArray()" name="" id="">
                         <option value="">选择列名</option>
                         <option *ngFor="let airline_col of render_col_lists" [value]="airline_col.COL_CODE">{{airline_col.COL_CN}}</option>
                     </select>
@@ -15,7 +15,7 @@
                         <input type="radio" [(ngModel)]="FLT_POS" [value]="2" name="filter-position">
                         <span>查找定位</span>
                     </label>
-                    <input class="form-control mr-4" [(ngModel)]="SEARCH" type="text" (keyup.enter)="inputEnter()">
+                    <input class="form-control mr-4" [(ngModel)]="SEARCH" (ngModelChange)="resetPositionArray()" type="text" (keyup.enter)="inputEnter()">
                     <label for="">查询日期：&nbsp;&nbsp;</label>
                     <input readonly style="background:transparent;cursor: pointer" type="text" id="selectDate" class="form-control">
                 </div>
diff --git a/src/app/pages/historical-data/historical-data.component.ts b/src/app/pages/historical-data/historical-data.component.ts
index 7bc5450..f964e04 100644
--- a/src/app/pages/historical-data/historical-data.component.ts
+++ b/src/app/pages/historical-data/historical-data.component.ts
@@ -231,6 +231,11 @@ export class HistoricalDataComponent implements OnInit {
             $(".table-body tbody>tr").eq(0).find('td').each((index, element) => {
                 $(".table-head table thead tr").eq(0).find('th').eq(index).attr('width', $(element).innerWidth() + 'px');
             })
+            if (this.tableBody.nativeElement.scrollHeight <= (this.tableBody.nativeElement.innerHeight || this.tableBody.nativeElement.clientHeight)) {
+                this.tableHead.nativeElement.style.overflowY = 'auto';
+            } else {
+                this.tableHead.nativeElement.style.overflowY = 'scroll';
+            }
         }
         return true;
     }
@@ -284,6 +289,8 @@ export class HistoricalDataComponent implements OnInit {
      */
     refresh() {
         this.operateSpinServiceService.showSpin();
+        this.positionedArray = [];  //定位数组为清空
+        this.positionArrayIndex = 0;    //定位元素Index归零
         this.SEARCH = '';    //手动输入条件
         this.FLT_POS = 1;    //过滤还是定位
         this.SEL_COL = '';   //选择列名
@@ -726,6 +733,14 @@ export class HistoricalDataComponent implements OnInit {
 
     }
 
+    /**
+     * 重置定位数组
+     */
+    resetPositionArray() {
+        this.positionedArray = [];
+        this.positionArrayIndex = 0;
+    }
+
     /**
      * 选中某行
      * @param i 
diff --git a/src/app/pages/main/main.component.ts b/src/app/pages/main/main.component.ts
index 37a5a40..6ea5967 100644
--- a/src/app/pages/main/main.component.ts
+++ b/src/app/pages/main/main.component.ts
@@ -295,6 +295,11 @@ export class MainComponent implements OnInit {
             $(".table-body tbody>tr").eq(0).find('td').each((index, element) => {
                 $(".table-head table thead tr").eq(0).find('th').eq(index).attr('width', $(element).innerWidth() + 'px');
             })
+            if (this.tableBody.nativeElement.scrollHeight <= (this.tableBody.nativeElement.innerHeight || this.tableBody.nativeElement.clientHeight)) {
+                this.tableHead.nativeElement.style.overflowY = 'auto';
+            } else {
+                this.tableHead.nativeElement.style.overflowY = 'scroll';
+            }
         }
         return true;
     }
diff --git a/src/app/pages/seasonal-plan/seasonal-plan.component.ts b/src/app/pages/seasonal-plan/seasonal-plan.component.ts
index ca72e67..28420ac 100644
--- a/src/app/pages/seasonal-plan/seasonal-plan.component.ts
+++ b/src/app/pages/seasonal-plan/seasonal-plan.component.ts
@@ -318,6 +318,11 @@ export class SeasonalPlanComponent implements OnInit {
             $(".table-body tbody>tr").eq(0).find('td').each((index, element) => {
                 $(".table-head table thead tr").eq(0).find('th').eq(index).attr('width', $(element).innerWidth() + 'px');
             })
+            if (this.tableBody.nativeElement.scrollHeight <= (this.tableBody.nativeElement.innerHeight || this.tableBody.nativeElement.clientHeight)) {
+                this.tableHead.nativeElement.style.overflowY = 'auto';
+            } else {
+                this.tableHead.nativeElement.style.overflowY = 'scroll';
+            }
         }
         return true;
     }