diff --git a/e2e/start-task.spec.ts b/e2e/start-task.spec.ts
new file mode 100644
index 0000000..f2ea790
--- /dev/null
+++ b/e2e/start-task.spec.ts
@@ -0,0 +1,180 @@
+import { test, expect } from '@playwright/test';
+
+const mockSessionOngoing = {
+  code: 200,
+  data: {
+    sessionNum: 'SESSION_001',
+    sessionState: 'ONGOING',
+    taskName: '学习 Vue3',
+    taskNum: 'T001',
+    startTime: '2026-05-30T10:00:00',
+    endTime: null,
+    lastStartTime: '2026-05-30T10:00:00',
+    actualTime: 0,
+    effectiveTime: 0,
+    effectivenessRatio: '--',
+    pointerPosition: 1500000,
+    systemMessage: '',
+  },
+};
+
+const mockSessionPaused = {
+  code: 200,
+  data: {
+    ...mockSessionOngoing.data,
+    sessionState: 'PAUSED',
+    lastStartTime: '2026-05-30T10:05:00',
+    actualTime: 300,
+    effectiveTime: 300,
+  },
+};
+
+const mockApiResponse = (code = 200, data: any = null, message = '请求成功') => ({
+  code,
+  message,
+  data,
+});
+
+test.describe('StartTask - 暂停后继续', () => {
+  test.beforeEach(async ({ page }) => {
+    // 模拟登录
+    await page.goto('/login');
+    await page.evaluate(() => localStorage.setItem('isLoggedIn', 'true'));
+
+    // mock startOrContinue API（初始加载返回 ONGOING 状态）
+    await page.route('**/api/tasks/*/study-sessions/start-or-continue', (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockSessionOngoing),
+      }),
+    );
+
+    // mock fragments API
+    await page.route('**/api/study-sessions/*/all-fragments', (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse(200, [])),
+      }),
+    );
+  });
+
+  test('暂停后点击开始，应触发 continue API', async ({ page }) => {
+    // 记录 API 调用
+    const apiCalls: string[] = [];
+
+    // mock pause API
+    await page.route('**/api/study-sessions/SESSION_001/study-sessions/pause', (route) => {
+      apiCalls.push('pause');
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse()),
+      });
+    });
+
+    // mock continue API
+    await page.route('**/api/study-sessions/SESSION_001/study-sessions/continue', (route) => {
+      apiCalls.push('continue');
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse()),
+      });
+    });
+
+    // 进入 start-task 页面
+    await page.goto('/start-task/T001');
+    await page.waitForSelector('.start-page', { timeout: 10_000 });
+
+    // 等待计时器启动
+    await expect(page.locator('.status-text')).toContainText('进行中');
+
+    // 点击暂停按钮
+    await page.locator('button', { hasText: '暂停' }).click();
+
+    // 验证暂停 API 被调用
+    expect(apiCalls).toContain('pause');
+
+    // 验证状态变为已暂停
+    await expect(page.locator('.status-text')).toContainText('已暂停');
+
+    // 点击开始按钮
+    await page.locator('button', { hasText: '开始' }).click();
+
+    // 验证 continue API 被调用
+    expect(apiCalls).toContain('continue');
+
+    // 验证状态恢复为进行中
+    await expect(page.locator('.status-text')).toContainText('进行中');
+  });
+
+  test('暂停后点击开始，不暂停时开始不应触发 continue API', async ({ page }) => {
+    const apiCalls: string[] = [];
+
+    await page.route('**/api/study-sessions/SESSION_001/study-sessions/pause', (route) => {
+      apiCalls.push('pause');
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse()),
+      });
+    });
+
+    await page.route('**/api/study-sessions/SESSION_001/study-sessions/continue', (route) => {
+      apiCalls.push('continue');
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse()),
+      });
+    });
+
+    await page.goto('/start-task/T001');
+    await page.waitForSelector('.start-page', { timeout: 10_000 });
+    await expect(page.locator('.status-text')).toContainText('进行中');
+
+    // ONGOING 状态下，开始按钮是 disabled 的，不应触发 continue
+    const startBtn = page.locator('button', { hasText: '开始' });
+    await expect(startBtn).toBeDisabled();
+
+    // continue API 不应被调用
+    expect(apiCalls).not.toContain('continue');
+  });
+
+  test('暂停后结束会话，应正确调用 ended API 并展示提示', async ({ page }) => {
+    await page.route('**/api/study-sessions/SESSION_001/study-sessions/pause', (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse()),
+      }),
+    );
+
+    await page.route('**/api/study-sessions/SESSION_001/study-sessions/ended', (route) =>
+      route.fulfill({
+        status: 200,
+        contentType: 'application/json',
+        body: JSON.stringify(mockApiResponse(200, null, '本次有效学习时间不足10分钟，不计入总学习时间')),
+      }),
+    );
+
+    await page.goto('/start-task/T001');
+    await page.waitForSelector('.start-page', { timeout: 10_000 });
+
+    // 暂停
+    await page.locator('button', { hasText: '暂停' }).click();
+    await expect(page.locator('.status-text')).toContainText('已暂停');
+
+    // 结束会话
+    await page.locator('button', { hasText: '结束会话' }).click();
+
+    // 在弹窗中输入总结内容
+    await page.locator('.el-dialog textarea').fill('测试总结');
+    await page.locator('.el-dialog button', { hasText: '确认结束' }).click();
+
+    // 应看到 warning 提示（有效时间不足）
+    await expect(page.locator('.el-message--warning')).toBeVisible({ timeout: 5000 });
+  });
+});