diff --git a/src/views/product/requirements-doc.vue b/src/views/product/requirements-doc.vue
index 319d4cc..c7a5e95 100644
--- a/src/views/product/requirements-doc.vue
+++ b/src/views/product/requirements-doc.vue
@@ -171,8 +171,9 @@
           </article>
 
           <div class="task-actions">
-            <button type="button" class="btn-nav" :disabled="!isDocumentReady || saving || documentUploading" @click="saveStepThree">{{ saving ? '保存中…' : '保存文档' }}</button>
+            <button type="button" class="btn-nav" :disabled="!isDocumentReady || saving || submitting || documentUploading" @click="saveStepThree">{{ saving ? '保存中…' : '保存文档' }}</button>
             <button type="button" class="btn-nav btn-submit" :disabled="!isDocumentReady || documentUploading" @click="showDocumentPreview = true"><el-icon><View /></el-icon>预览文档</button>
+            <button type="button" class="btn-nav btn-primary" :disabled="!canSubmitTask || saving || submitting || documentUploading" @click="submitTask">{{ submitting ? '提交中…' : '提交任务' }}</button>
           </div>
         </section>
 
@@ -293,6 +294,7 @@ const draggingPurposeId = ref("");
 const dragOverModuleId = ref("");
 const checking = ref(false);
 const saving = ref(false);
+const submitting = ref(false);
 const stepOnePassed = ref(false);
 const checkResult = ref(null);
 
@@ -305,6 +307,7 @@ const progressItems = computed(() => trainingSteps.value.map((text, index) => ({
 const unassignedPurposes = computed(() => PURPOSES.filter((purpose) => !Object.values(assignments.value).includes(purpose.id)));
 const allAssigned = computed(() => MODULES.every((module) => Boolean(assignments.value[module.id])) && Object.keys(assignments.value).length === MODULES.length);
 const isDocumentReady = computed(() => Boolean(stepThreeDocument.value.name && stepThreeDocument.value.url));
+const canSubmitTask = computed(() => stepOnePassed.value && isDocumentReady.value);
 const sidebarStudyTip = computed(() => currentStep.value === 3
   ? "先依据第 2 步的模块信息整理成完整 PRD，再上传 .docx 或 .pdf。上传完成后请打开在线预览，确认文档内容和版本无误。"
   : currentStep.value === 2
@@ -382,6 +385,7 @@ function buildStepThreeAnswer() { return { document: { ...stepThreeDocument.valu
 function buildSavePayload(current = currentStep.value) {
   return { currentStep: current, step1Answer: JSON.stringify(buildStepOneAnswer()), step2Answer: JSON.stringify(buildStepTwoAnswer()), step3Answer: JSON.stringify(buildStepThreeAnswer()), submitted: false, saveAction: "SAVE" };
 }
+function buildSubmitPayload() { return { ...buildSavePayload(3), submitted: true, saveAction: "SUBMIT" }; }
 async function persist(current = currentStep.value) { await saveStudentTrainingAnswer(TASK_KEY, buildSavePayload(current)); }
 async function saveCurrentMatching() {
   if (saving.value) return;
@@ -454,6 +458,13 @@ async function saveStepThree() {
   saving.value = true;
   try { await persist(3); proxy?.$modal?.msgSuccess("产品需求文档已保存"); } catch (error) { proxy?.$modal?.msgError(error?.message || "保存失败，请稍后重试"); } finally { saving.value = false; }
 }
+async function submitTask() {
+  if (!canSubmitTask.value || saving.value || submitting.value || documentUploading.value) return;
+  submitting.value = true;
+  try { await saveStudentTrainingAnswer(TASK_KEY, buildSubmitPayload()); proxy?.$modal?.msgSuccess("产品需求文档已提交"); }
+  catch (error) { proxy?.$modal?.msgError(error?.message || "提交失败，请稍后重试"); }
+  finally { submitting.value = false; }
+}
 async function exportStepTwoTable() {
   try {
     const XLSX = await import("xlsx");
diff --git a/tests/requirements-doc-submit.static.test.cjs b/tests/requirements-doc-submit.static.test.cjs
new file mode 100644
index 0000000..453feda
--- /dev/null
+++ b/tests/requirements-doc-submit.static.test.cjs
@@ -0,0 +1,20 @@
+const fs = require("node:fs");
+const path = require("node:path");
+const test = require("node:test");
+const assert = require("node:assert/strict");
+
+const page = fs.readFileSync(path.join(__dirname, "../src/views/product/requirements-doc.vue"), "utf8");
+
+test("产品需求说明书在已完成匹配且文档就绪时可以提交任务", () => {
+  assert.match(page, /const canSubmitTask = computed\(\(\) => stepOnePassed\.value && isDocumentReady\.value\);/);
+  assert.match(page, /@click="submitTask"/);
+  assert.match(page, /提交任务/);
+  assert.match(page, /:disabled="!canSubmitTask \|\| saving \|\| submitting \|\| documentUploading"/);
+});
+
+test("产品需求说明书最终提交保存完整答案并标记为已提交", () => {
+  assert.match(page, /function buildSubmitPayload\(\) \{ return \{ \.\.\.buildSavePayload\(3\), submitted: true, saveAction: "SUBMIT" \}; \}/);
+  assert.match(page, /async function submitTask\(\)[\s\S]*?await saveStudentTrainingAnswer\(TASK_KEY, buildSubmitPayload\(\)\)/);
+  assert.match(page, /产品需求文档已提交/);
+  assert.match(page, /提交失败，请稍后重试/);
+});