diff --git a/packages/components/input-number/__tests__/input-number.test.tsx b/packages/components/input-number/__tests__/input-number.test.tsx
index 537e31b885..1c6f3423db 100644
--- a/packages/components/input-number/__tests__/input-number.test.tsx
+++ b/packages/components/input-number/__tests__/input-number.test.tsx
@@ -94,6 +94,22 @@ describe('InputNumber.vue', () => {
     expect(wrapper.find('input').element.value).toEqual('4')
   })
 
+  test('value decimals miss prop precision', async () => {
+    const num = ref(0.2)
+    const wrapper = mount(() => (
+      <InputNumber step-strictly={true} step={0.1} v-model={num.value} />
+    ))
+    const elInputNumber = wrapper.findComponent({ name: 'ElInputNumber' }).vm
+    elInputNumber.increase()
+    await nextTick()
+    expect(wrapper.find('input').element.value).toEqual('0.3')
+    num.value = 0.4
+    await nextTick()
+    elInputNumber.decrease()
+    await nextTick()
+    expect(wrapper.find('input').element.value).toEqual('0.3')
+  })
+
   describe('precision accuracy 2', () => {
     const num = ref(0)
     const wrapper = mount(() => (
diff --git a/packages/components/input-number/src/input-number.vue b/packages/components/input-number/src/input-number.vue
index 89607b5a4b..57165ac658 100644
--- a/packages/components/input-number/src/input-number.vue
+++ b/packages/components/input-number/src/input-number.vue
@@ -201,7 +201,7 @@ const verifyValue = (
     newVal = isString(valueOnClear) ? { min, max }[valueOnClear] : valueOnClear
   }
   if (stepStrictly) {
-    newVal = Math.round(newVal / step) * step
+    newVal = toPrecision(Math.round(newVal / step) * step, precision)
   }
   if (!isUndefined(precision)) {
     newVal = toPrecision(newVal, precision)