diff --git a/Readme.md b/Readme.md
index 67c5b45..bc23dcd 100644
--- a/Readme.md
+++ b/Readme.md
@@ -30,7 +30,7 @@
 - [x] `wc-passwd`表单组件-文本输入框
 - [x] `wc-textarea`表单组件-多行文本输入框
 - [x] `wc-number`表单组件-步进数字输入
-- [ ] `wc-star`表单组件-评分
+- [x] `wc-star`表单组件-评分
 - [x] `wc-radio`表单组件-单选框
 - [ ] `wc-select`表单组件-下拉选择
 - [ ] `wc-cascadar`表单组件-多级联动
diff --git a/src/form/button.js b/src/form/button.js
index e2dd437..89f5b2d 100644
--- a/src/form/button.js
+++ b/src/form/button.js
@@ -111,11 +111,6 @@ class Button extends Component {
           w: 192px,
           h: 52px,
           f: 16px
-        ),
-        xxxxl: (
-          w: 212px,
-          h: 64px,
-          f: 18px
         )
       );
 
diff --git a/src/form/star.js b/src/form/star.js
new file mode 100644
index 0000000..e5c3372
--- /dev/null
+++ b/src/form/star.js
@@ -0,0 +1,204 @@
+/**
+ * {}
+ * @author yutent<yutent.io@gmail.com>
+ * @date 2023/03/21 16:14:10
+ */
+
+import { nextTick, css, html, Component, classMap } from '@bd/core'
+import '../icon/index.js'
+
+class Star extends Component {
+  static props = {
+    value: 0,
+    text: [],
+    size: 'l',
+    colors: [],
+    'allow-half': false,
+    'show-value': false,
+    disabled: false,
+    clearable: false
+  }
+
+  static styles = [
+    css`
+      :host {
+        display: flex;
+        font-size: 14px;
+        --size: 32px;
+        cursor: pointer;
+        user-select: none;
+      }
+      label {
+        display: flex;
+        align-items: center;
+        line-height: 1;
+        color: let(--color-grey-1);
+        cursor: inherit;
+
+        wc-icon {
+          margin: 0 3px;
+          transition: transform 0.15s linear, color 0.15s linear;
+
+          &[name='star'] {
+            color: let(--color-plain-3);
+          }
+
+          &[name='star-full'],
+          &[name='star-half'] {
+            color: let(--color-teal-1);
+          }
+
+          &:hover {
+            transform: scale(1.05);
+          }
+        }
+
+        span {
+          padding: 2px 8px 0;
+          margin: 0 6px;
+        }
+      }
+    `,
+    // 尺寸
+    css`
+      @use 'sass:map';
+      $sizes: (
+        s: (
+          w: 52px,
+          h: 20px,
+          f: 12px
+        ),
+        m: (
+          w: 72px,
+          h: 24px,
+          f: 12px
+        ),
+        l: (
+          w: 108px,
+          h: 32px,
+          f: 14px
+        )
+      );
+
+      @loop $s, $v in $sizes {
+        :host([size='#{$s}']) {
+          --size: #{map.get($v, 'h')};
+          font-size: map.get($v, 'f');
+        }
+      }
+    `
+  ]
+
+  #width = 32
+  #value = { i: 0, f: 0 }
+  #stars = []
+
+  /**
+   * 更新图标渲染
+   * i: int
+   * f: float
+   */
+  #updateDraw(i, f = 0) {
+    let _last = 'star-half'
+
+    let value = this.value
+    let tmp = this.#value
+
+    if (i === -1) {
+      i = Math.floor(value)
+      f = +(value % 1).toFixed(1)
+      if (i > 0 && i === value) {
+        i--
+        f = 1
+      }
+    } else {
+      f = f < 0.5 ? 0.5 : 1
+    }
+
+    if (!this['allow-half']) {
+      f = f > 0 ? 1 : 0
+    }
+    // 减少DOM操作
+    if (i === tmp.i && f === tmp.f) {
+      return
+    }
+
+    if (f > 0.5) {
+      _last = 'star-full'
+    }
+
+    this.#stars.forEach((it, k) => {
+      it.name = k < i ? 'star-full' : 'star'
+      it.style.color = k < i ? this.color || 'var(--color-teal-1)' : ''
+    })
+
+    if (f > 0) {
+      this.#stars[i].name = _last
+      this.#stars[i].style.color = this.color || 'var(--color-teal-1)'
+    }
+
+    // 缓存结果
+    this.#value = { i, f }
+  }
+
+  handleMove(ev) {
+    if (this.disabled) {
+      return
+    }
+
+    if (ev.target.tagName === 'WC-ICON') {
+      let idx = +ev.target.dataset.idx
+      this.#updateDraw(idx, +(ev.offsetX / this.#width).toFixed(1))
+    }
+  }
+
+  handleLeave() {
+    if (this.disabled) {
+      return
+    }
+    this.#updateDraw(-1)
+  }
+
+  handleClick(ev) {
+    let tmp = this.#value
+    if (this.disabled) {
+      return
+    }
+    if (ev.target.tagName === 'WC-ICON') {
+      if (this.clearable && this.value === tmp.i + tmp.f) {
+        tmp.i = 0
+        tmp.f = 0
+        this.value = 0
+        this.#stars.forEach(it => ((it.name = 'star'), (it.style.color = '')))
+      } else {
+        this.value = tmp.i + tmp.f
+      }
+      this.$emit('change', { value: this.value })
+    }
+  }
+
+  mounted() {
+    this.#stars = [...this.$refs.box.children]
+    this.#width = this.#stars[0].clientWidth
+  }
+
+  render() {
+    return html`
+      <label
+        ref="box"
+        @mousemove=${this.handleMove}
+        @mouseleave=${this.handleLeave}
+        @click=${this.handleClick}
+      >
+        <wc-icon data-idx="0" name="star"></wc-icon>
+        <wc-icon data-idx="1" name="star"></wc-icon>
+        <wc-icon data-idx="2" name="star"></wc-icon>
+        <wc-icon data-idx="3" name="star"></wc-icon>
+        <wc-icon data-idx="4" name="star"></wc-icon>
+        <span class="text">${this['show-value'] ? this.value : ''}</span>
+      </label>
+    `
+  }
+}
+
+Star.reg('star')
diff --git a/src/icon/index.js b/src/icon/index.js
index c7df197..f4d5e52 100644
--- a/src/icon/index.js
+++ b/src/icon/index.js
@@ -57,8 +57,7 @@ class Icon extends Component {
       'l': 32px,
       'xl': 36px,
       'xxl': 44px,
-      'xxxl': 52px,
-      'xxxxl': 64px
+      'xxxl': 52px
     );
 
     @loop $k, $v in $gaps {
diff --git a/开发规范.md b/开发规范.md
index 963c1a2..6f543ca 100644
--- a/开发规范.md
+++ b/开发规范.md
@@ -13,15 +13,14 @@
   - `type=help`  灰色
 
 3. 尺寸, 主要指 高度
-  > 需要注意的是, 这里的高度, 仅为组件本身应该占的高度, 而非"可视内容"的真实高度, 比如 开头按钮, 实际上就可以不需要那么大。
+  > 需要注意的是, 这里的高度, 仅为组件本身应该占的高度, 而非"可视内容"的真实高度, 比如 开关按钮, 实际上就可以不需要那么大。
 
   - `size=s`  小号, 20px
   - `size=m`  中号, 24px
   - `size=l`  大号,  32px (默认值)
   - `size=xl`  加大号, 36px
   - `size=xxl`  加加大号, 44px
-  - `size=xxxl`  加加加加大号, 52px
-  - `size=xxxxl`  特大号,   64px
+  - `size=xxxl`  加加加大号, 52px
 
 4. 自带点击事件的组件, 统一增加"节流/防抖"逻辑
   > 统一为增加 `lazy="1000"` 属性实现
\ No newline at end of file