diff --git a/problems/0024.两两交换链表中的节点.md b/problems/0024.两两交换链表中的节点.md
index ce75e0d7..2289c229 100644
--- a/problems/0024.两两交换链表中的节点.md
+++ b/problems/0024.两两交换链表中的节点.md
@@ -311,7 +311,29 @@ func swapPairs(_ head: ListNode?) -> ListNode? {
     return dummyHead.next
 }
 ```
-
+Scala:
+```scala
+// 虚拟头节点
+object Solution {
+  def swapPairs(head: ListNode): ListNode = {
+    var dummy = new ListNode(0, head) // 虚拟头节点
+    var pre = dummy
+    var cur = head
+    // 当pre的下一个和下下个都不为空，才进行两两转换
+    while (pre.next != null && pre.next.next != null) {
+      var tmp: ListNode = cur.next.next // 缓存下一次要进行转换的第一个节点
+      pre.next = cur.next // 步骤一
+      cur.next.next = cur // 步骤二
+      cur.next = tmp // 步骤三
+      // 下面是准备下一轮的交换
+      pre = cur
+      cur = tmp
+    }
+    // 最终返回dummy虚拟头节点的下一个，return可以省略
+    dummy.next
+  }
+}
+```
 
 -----------------------
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>
diff --git a/problems/0206.翻转链表.md b/problems/0206.翻转链表.md
index 941928ba..25b16907 100644
--- a/problems/0206.翻转链表.md
+++ b/problems/0206.翻转链表.md
@@ -496,6 +496,40 @@ struct ListNode* reverseList(struct ListNode* head){
     return reverse(NULL, head);
 }
 ```
+Scala:
 
+双指针法：
+```scala
+object Solution {
+  def reverseList(head: ListNode): ListNode = {
+    var pre: ListNode = null
+    var cur = head
+    while (cur != null) {
+      var tmp = cur.next
+      cur.next = pre
+      pre = cur
+      cur = tmp
+    }
+    pre
+  }
+}
+```
+递归法：
+```scala
+object Solution {
+  def reverseList(head: ListNode): ListNode = {
+    reverse(null, head)
+  }
+
+  def reverse(pre: ListNode, cur: ListNode): ListNode = {
+    if (cur == null) {
+      return pre    // 如果当前cur为空，则返回pre
+    }
+    val tmp: ListNode = cur.next
+    cur.next = pre
+    reverse(cur, tmp)   // 此时cur成为前一个节点，tmp是当前节点
+  }
+}
+```
 -----------------------
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码一.jpg width=500> </img></div>
diff --git a/problems/0707.设计链表.md b/problems/0707.设计链表.md
index 37ce15ad..dcdb53f4 100644
--- a/problems/0707.设计链表.md
+++ b/problems/0707.设计链表.md
@@ -1154,7 +1154,75 @@ class MyLinkedList {
 }
 ```
 
+Scala:
+```scala
+class ListNode(_x: Int = 0, _next: ListNode = null) {
+  var next: ListNode = _next
+  var x: Int = _x
+}
 
+class MyLinkedList() {
+
+  var size = 0 // 链表尺寸
+  var dummy: ListNode = new ListNode(0) // 虚拟头节点
+  
+  // 获取第index个节点的值
+  def get(index: Int): Int = {
+    if (index < 0 || index >= size) {
+      return -1;
+    }
+    var cur = dummy
+    for (i <- 0 to index) {
+      cur = cur.next
+    }
+    cur.x // 返回cur的值
+  }
+  
+  // 在链表最前面插入一个节点
+  def addAtHead(`val`: Int) {
+    addAtIndex(0, `val`)
+  }
+  
+  // 在链表最后面插入一个节点
+  def addAtTail(`val`: Int) {
+    addAtIndex(size, `val`)
+  }
+  
+  // 在第index个节点之前插入一个新节点
+  // 如果index等于链表长度，则说明新插入的节点是尾巴
+  // 如果index等于0，则说明新插入的节点是头
+  // 如果index>链表长度，则说明为空
+  def addAtIndex(index: Int, `val`: Int) {
+    if (index > size) {
+      return
+    }
+    var loc = index // 因为参数index是val不可变类型，所以需要赋值给一个可变类型
+    if (index < 0) {
+      loc = 0
+    }
+    size += 1 //链表尺寸+1
+    var pre = dummy
+    for (i <- 0 until loc) {
+      pre = pre.next
+    }
+    val node: ListNode = new ListNode(`val`, pre.next)
+    pre.next = node
+  }
+  // 删除第index个节点
+  def deleteAtIndex(index: Int) {
+    if (index < 0 || index >= size) {
+      return
+    }
+    size -= 1
+    var pre = dummy
+    for (i <- 0 until index) {
+      pre = pre.next
+    }
+    pre.next = pre.next.next
+  }
+
+}
+```
 
 
 -----------------------