diff --git a/package/component/src/component/inputNumber/index.vue b/package/component/src/component/inputNumber/index.vue
index ebd76955..2e125629 100644
--- a/package/component/src/component/inputNumber/index.vue
+++ b/package/component/src/component/inputNumber/index.vue
@@ -11,6 +11,7 @@ import { LayIcon } from "@layui/icons-vue";
 import layButton from "../button/index.vue";
 import { ref, watch, withDefaults, computed, Ref } from "vue";
 import { InputNumberSize } from "./interface";
+import { add, sub } from "./math"
 
 export interface InputNumberProps {
   modelValue?: number;
@@ -84,11 +85,11 @@ const maxControl = computed(() => {
 });
 
 const addition = function () {
-  num.value += Number(props.step);
+  num.value = add(num.value, props.step);
 };
 
 const subtraction = function () {
-  num.value -= Number(props.step);
+  num.value = Number(sub(num.value, props.step));
 };
 
 const longDown = function (fn: Function) {
diff --git a/package/component/src/component/inputNumber/math.ts b/package/component/src/component/inputNumber/math.ts
new file mode 100644
index 00000000..4fbc61bd
--- /dev/null
+++ b/package/component/src/component/inputNumber/math.ts
@@ -0,0 +1,21 @@
+//加法
+function add(arg1: number, arg2: number) {
+    var r1, r2, m;
+    try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
+    try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
+    m = Math.pow(10, Math.max(r1, r2))
+    return (arg1 * m + arg2 * m) / m
+}
+//减法
+function sub(arg1: number, arg2: number) {
+    var r1, r2, m, n;
+    try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
+    try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
+    m = Math.pow(10, Math.max(r1, r2));
+    n = (r1 >= r2) ? r1 : r2;
+    return ((arg1 * m - arg2 * m) / m).toFixed(n);
+}
+export {
+  add,
+  sub,
+}
\ No newline at end of file
diff --git a/package/document-component/src/document/zh-CN/components/inputNumber.md b/package/document-component/src/document/zh-CN/components/inputNumber.md
index 5cd72561..a53a15bf 100644
--- a/package/document-component/src/document/zh-CN/components/inputNumber.md
+++ b/package/document-component/src/document/zh-CN/components/inputNumber.md
@@ -14,7 +14,7 @@
 
 <template>
   {{data1}}
-  <lay-input-number v-model="data1"></lay-input-number>
+  <lay-input-number v-model="data1" :step="0.1"></lay-input-number>
   <lay-input-number v-model="data2"  position="right"></lay-input-number>
 </template>
 
diff --git a/package/document-component/src/document/zh-CN/guide/changelog.md b/package/document-component/src/document/zh-CN/guide/changelog.md
index 84efb7c8..e3d339d2 100644
--- a/package/document-component/src/document/zh-CN/guide/changelog.md
+++ b/package/document-component/src/document/zh-CN/guide/changelog.md
@@ -17,13 +17,13 @@
         <h3>1.7.6 <span class="layui-badge-rim">2022-11-07</span></h3> 
         <ul>
           <li>[新增] page-header 组件 back-icon 属性, 自定义返回图标。</li>
+          <li>[修复] datePicker 组件 年选择器 清空后再点击确定回显错误。</li>
           <li>[修复] select 组件 单选模式 与 多选模式 清空操作样式不统一的问题。</li>
           <li>[修复] select 组件 单选模式 与 多选模式 下拉宽度不一致的问题。</li>
           <li>[修复] select 组件 多选模式 @search 事件不生效的问题。</li>
           <li>[优化] select 组件 label 属性不兼容 number 类型。</li>
           <li>[优化] select-option 组件 label 属性为 null 时, 单选不展示。</li>
           <li>[优化] select-option 组件 label 属性为 null 时, 搜索报错。</li>
-          <li>[修复] datePicker 组件 年选择器 清空后再点击确定回显错误。</li>
           <li>[优化] datePicker 组件 新增change,blur,foucs事件。</li>
         </ul> 
       </li>