diff --git a/app.py b/app.py
index d422e00..9a5395a 100644
--- a/app.py
+++ b/app.py
@@ -412,7 +412,7 @@ class GroupStore:
             return False, "你已加入其他组，不能创建组；请先退出当前组", None
         if student["must_change_password"]:
             return False, "首次登录必须先修改密码", None
-        group_name = group_name.strip() or "未命名小组"
+        group_name = group_name.strip() or student["name"]
         with self.lock, self.connection:
             count = self.connection.execute(
                 "SELECT COUNT(*) AS n FROM groups WHERE class_name=?", (student["class_name"],)
@@ -497,6 +497,34 @@ class GroupStore:
                 )
         return True, "组长已解散小组" if is_leader else "已退出小组"
 
+    def leader_remove_member(self, leader_student_id: int, member_student_id: int) -> tuple[bool, str]:
+        with self.lock, self.connection:
+            leader_group = self.connection.execute(
+                """SELECT m.group_id,g.name,g.class_name,g.leader_student_id
+                FROM group_members m JOIN groups g ON g.id=m.group_id
+                WHERE m.student_id=?""",
+                (leader_student_id,),
+            ).fetchone()
+            if leader_group is None or leader_group["leader_student_id"] != leader_student_id:
+                return False, "只有组长可以移出组员"
+            if leader_student_id == member_student_id:
+                return False, "组长不能移出自己；如需退出请解散小组"
+            if self.is_locked(leader_group["class_name"]):
+                return False, "老师已停止分组操作，当前只能查看"
+            member = self.connection.execute(
+                """SELECT st.name
+                FROM group_members m JOIN students st ON st.id=m.student_id
+                WHERE m.student_id=? AND m.group_id=?""",
+                (member_student_id, leader_group["group_id"]),
+            ).fetchone()
+            if member is None:
+                return False, "该学生不在你的小组中"
+            self.connection.execute(
+                "DELETE FROM group_members WHERE student_id=? AND group_id=?",
+                (member_student_id, leader_group["group_id"]),
+            )
+        return True, f"已将 {member['name']} 移出小组"
+
     def switch_class(self, class_name: str) -> tuple[bool, str]:
         with self.lock:
             row = self.connection.execute(
@@ -825,6 +853,7 @@ class GroupRequestHandler:
                 return json_response(HTTPStatus.OK, {"ok": True, "authenticated": False})
             active = STORE.active_class()
             common = {
+                "ok": True,
                 "authenticated": True,
                 "role": session["role"],
                 "active_class": active,
@@ -923,6 +952,19 @@ class GroupRequestHandler:
                 {"ok": ok, "message": message, "require_confirm": (not ok and "确认后才会执行" in message)},
             )
 
+        if action == "groups/remove-member" and method == "POST":
+            session, error = self.require_student()
+            if error:
+                return error
+            data = self.read_json()
+            ok, message = STORE.leader_remove_member(
+                session["student_id"], int(data.get("student_id", 0))
+            )
+            return json_response(
+                HTTPStatus.OK if ok else HTTPStatus.BAD_REQUEST,
+                {"ok": ok, "message": message},
+            )
+
         if action == "teacher/class" and method == "POST":
             _, error = self.require_teacher()
             if error:
diff --git a/static/student.js b/static/student.js
index d34aafe..80585f2 100644
--- a/static/student.js
+++ b/static/student.js
@@ -39,7 +39,7 @@ function renderMyGroup() {
       <form id="createForm">
         <label for="groupName">创建新组</label>
         <div class="form-line">
-          <input id="groupName" maxlength="30" placeholder="输入组名，例如：第 1 组" required>
+          <input id="groupName" maxlength="30" value="${text(state.user.name)}" placeholder="默认使用你的姓名" required>
           <button data-working type="submit">创建</button>
         </div>
         <p class="hint">创建后你是组长。每组成员（包括组长）最多 ${state.snapshot.group_limit} 人。已加入别人的组时不能创建。</p>
@@ -75,6 +75,7 @@ function renderGroups() {
   }
   grid.innerHTML = state.snapshot.groups.map(group => {
     const own = state.membership && state.membership.group_id === group.id;
+    const ownLeader = own && state.membership.leader_student_id === state.user.id;
     const locked = state.snapshot.locked;
     const full = group.full;
     let disabledReason = '';
@@ -87,7 +88,10 @@ function renderGroups() {
           <span class="chip ${full ? 'full' : ''}">${group.member_count}/${state.snapshot.group_limit} 人</span>
         </div>
         <ul class="member-list">
-          ${group.members.length ? group.members.map(member => `<li>${memberLine(member)}</li>`).join('') : '<li><span class="hint">暂无成员</span></li>'}
+          ${group.members.length ? group.members.map(member => `<li>${memberLine(member)}${ownLeader && !member.is_leader
+            ? `<button class="small danger" data-working data-kick="${member.id}" data-name="${text(member.name)}"
+              ${locked ? 'disabled data-reason="老师已停止分组操作"' : ''}>移出</button>` : ''}</li>`).join('')
+            : '<li><span class="hint">暂无成员</span></li>'}
         </ul>
         ${own ? '<span class="chip active">我的当前组</span>'
           : `<button class="small" data-working data-group="${group.id}" data-reason="${text(disabledReason)}">加入</button>`}
@@ -100,6 +104,15 @@ function renderGroups() {
     }
     submitJoin(Number(button.dataset.group));
   }));
+  grid.querySelectorAll('button[data-kick]').forEach(button => button.addEventListener('click', () => {
+    if (button.dataset.reason) {
+      toast(button.dataset.reason, true);
+      return;
+    }
+    if (requireConfirm(`确定将 ${button.dataset.name} 移出小组吗？`)) {
+      submitKick(Number(button.dataset.kick));
+    }
+  }));
 }
 
 function renderState() {
@@ -160,6 +173,15 @@ async function submitJoin(groupId, confirmed = false) {
   if (result.ok) await loadState();
 }
 
+async function submitKick(studentId) {
+  const result = await api('groups/remove-member', {
+    method: 'POST',
+    json: { student_id: studentId }
+  });
+  toast(result.message, !result.ok);
+  if (result.ok) await loadState();
+}
+
 async function submitLeave(confirmed = false) {
   const result = await api('leave', { method: 'POST', json: { confirmed } });
   if (!result.ok && result.require_confirm) {