diff --git a/src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-card.types.ts b/src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-card.types.ts
new file mode 100644
index 0000000..9e5b6bf
--- /dev/null
+++ b/src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-card.types.ts
@@ -0,0 +1,13 @@
+export type BilibiliVideoReference =
+  | {
+      canonicalVideoId: string;
+      kind: 'bvid';
+      sourceUrl: string;
+      value: string;
+    }
+  | {
+      canonicalVideoId: string;
+      kind: 'aid';
+      sourceUrl: string;
+      value: string;
+    };
diff --git a/src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-url-parser.ts b/src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-url-parser.ts
new file mode 100644
index 0000000..ce21357
--- /dev/null
+++ b/src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-url-parser.ts
@@ -0,0 +1,79 @@
+import type { BilibiliVideoReference } from './bilibili-card.types';
+
+const BILIBILI_HOST = 'bilibili.com';
+const B23_HOST = 'b23.tv';
+const TRAILING_WRAPPERS = /[\s"'<>，。！？、；：）)\]}]+$/u;
+const LEADING_WRAPPERS = /^[\s"'<>（([{]+/u;
+const BVID_PATTERN = /(?:^|\/)(BV[0-9A-Za-z]{10,})/;
+const AID_PATTERN = /(?:^|\/)(?:av|AV)(\d+)(?:$|[/?#])/;
+
+/**
+ * Removes QQ card wrappers and punctuation that often stick to copied URLs.
+ * @param candidate - Raw string fragment found in text or card JSON.
+ * @returns Cleaned URL candidate ready for `URL` parsing.
+ */
+export function cleanBilibiliUrlCandidate(candidate: string) {
+  return candidate
+    .replaceAll('&amp;', '&')
+    .replaceAll('&quot;', '"')
+    .replaceAll('&#34;', '"')
+    .replace(LEADING_WRAPPERS, '')
+    .replace(TRAILING_WRAPPERS, '')
+    .trim();
+}
+
+/**
+ * Checks whether a URL belongs to the Bilibili domains this plugin is allowed to parse.
+ * @param candidate - URL string collected from a QQ message or redirect result.
+ * @returns `true` when the host is Bilibili-owned or `b23.tv`.
+ */
+export function isAllowedBilibiliUrl(candidate: string) {
+  try {
+    const url = new URL(cleanBilibiliUrlCandidate(candidate));
+    const hostname = url.hostname.toLowerCase();
+    return (
+      (url.protocol === 'http:' || url.protocol === 'https:') &&
+      (hostname === B23_HOST ||
+        hostname === BILIBILI_HOST ||
+        hostname.endsWith(`.${BILIBILI_HOST}`))
+    );
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Extracts a Bilibili video identifier from a supported URL.
+ * @param candidate - Direct Bilibili video URL or short-link URL that already embeds BV/av.
+ * @returns Parsed video reference, or `null` when the URL is not a supported video URL.
+ */
+export function parseBilibiliVideoReference(
+  candidate: string,
+): BilibiliVideoReference | null {
+  const cleaned = cleanBilibiliUrlCandidate(candidate);
+  if (!isAllowedBilibiliUrl(cleaned)) return null;
+
+  const url = new URL(cleaned);
+  const probe = `${url.pathname}${url.search}${url.hash}`;
+  const bvid = probe.match(BVID_PATTERN)?.[1];
+  if (bvid) {
+    return {
+      canonicalVideoId: bvid,
+      kind: 'bvid',
+      sourceUrl: cleaned,
+      value: bvid,
+    };
+  }
+
+  const aid = `${url.pathname}/`.match(AID_PATTERN)?.[1];
+  if (aid) {
+    return {
+      canonicalVideoId: `av${aid}`,
+      kind: 'aid',
+      sourceUrl: cleaned,
+      value: aid,
+    };
+  }
+
+  return null;
+}
diff --git a/test/modules/qqbot/plugins/bilibili-card/bilibili-url-parser.spec.ts b/test/modules/qqbot/plugins/bilibili-card/bilibili-url-parser.spec.ts
new file mode 100644
index 0000000..03a7445
--- /dev/null
+++ b/test/modules/qqbot/plugins/bilibili-card/bilibili-url-parser.spec.ts
@@ -0,0 +1,47 @@
+import {
+  cleanBilibiliUrlCandidate,
+  isAllowedBilibiliUrl,
+  parseBilibiliVideoReference,
+} from '../../../../../src/modules/qqbot/plugins/bilibili-card/src/domain/bilibili-url-parser';
+
+describe('Bilibili URL parser', () => {
+  it('parses BV video URLs while ignoring query, hash, and trailing punctuation', () => {
+    const reference = parseBilibiliVideoReference(
+      'https://www.bilibili.com/video/BV1xx411c7mD/?share_source=qq#reply。',
+    );
+
+    expect(reference).toEqual({
+      canonicalVideoId: 'BV1xx411c7mD',
+      kind: 'bvid',
+      sourceUrl:
+        'https://www.bilibili.com/video/BV1xx411c7mD/?share_source=qq#reply',
+      value: 'BV1xx411c7mD',
+    });
+  });
+
+  it('parses av video URLs from mobile Bilibili links', () => {
+    expect(
+      parseBilibiliVideoReference('https://m.bilibili.com/video/av170001'),
+    ).toMatchObject({
+      canonicalVideoId: 'av170001',
+      kind: 'aid',
+      value: '170001',
+    });
+  });
+
+  it('allows only Bilibili and b23.tv hosts', () => {
+    expect(isAllowedBilibiliUrl('https://b23.tv/abc123')).toBe(true);
+    expect(isAllowedBilibiliUrl('https://space.bilibili.com/1')).toBe(true);
+    expect(isAllowedBilibiliUrl('https://example.com/video/BV1xx411c7mD')).toBe(
+      false,
+    );
+  });
+
+  it('cleans card wrappers, html entities, and trailing brackets', () => {
+    expect(
+      cleanBilibiliUrlCandidate(
+        '&quot;https://www.bilibili.com/video/BV1xx411c7mD?p=1&quot;）',
+      ),
+    ).toBe('https://www.bilibili.com/video/BV1xx411c7mD?p=1');
+  });
+});