diff --git a/RedisStudyTest/RedisSortedSetStudyTest.cs b/RedisStudyTest/RedisSortedSetStudyTest.cs
index e3ee120..1924be1 100644
--- a/RedisStudyTest/RedisSortedSetStudyTest.cs
+++ b/RedisStudyTest/RedisSortedSetStudyTest.cs
@@ -1210,11 +1210,198 @@ namespace RedisStudyTest
         }
         #endregion
 
-        #region SortedSetCombineAndStore todo:待做任务
+        #region SortedSetCombineAndStore
+        [Fact]
+        public void SortedSetCombineAndStore_NotKey_Test()
+        {
+            var memberNumber = redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Union, "destination", "first", "second", Aggregate.Sum, CommandFlags.None);
+
+            Assert.Equal(0, memberNumber);
+        }
+
+        /// <summary>
+        /// 目标集合不存在
+        /// (创建目标集成)
+        /// </summary>
+        [Fact]
+        public void SortedSetCombineAndStore_NotDestination_Test()
+        {
+            //准备
+            RedisKey destinationKey = "RedisStudy:SortedSet:destination";
+            RedisKey firstKey = "RedisStudy:SortedSet:first";
+            RedisKey secondKey = "RedisStudy:SortedSet:second";
+
+            //删除旧数据
+            redisDatabase.KeyDelete(destinationKey);
+            redisDatabase.KeyDelete(firstKey);
+            redisDatabase.KeyDelete(secondKey);
+
+            SortedSetEntry[] firstEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("first",1),
+                new SortedSetEntry("second",2),
+            };
+
+            SortedSetEntry[] secondEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("third",3),
+                new SortedSetEntry("fourth",4),
+            };
+
+            redisSortedSetStudy.SortedSetAdd(firstKey, firstEntries);
+            redisSortedSetStudy.SortedSetAdd(secondKey, secondEntries);
+
+            //操作
+            var combineNum = redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Union, destinationKey, firstKey, secondKey, Aggregate.Sum, CommandFlags.None);
+            Assert.Equal(4, combineNum);
+
+            var destinationLenth = redisSortedSetStudy.SortedSetLength(destinationKey);
+            Assert.Equal(4, destinationLenth);
+
+            //清理
+            redisDatabase.KeyDelete(destinationKey);
+            redisDatabase.KeyDelete(firstKey);
+            redisDatabase.KeyDelete(secondKey);
+        }
+
+        /// <summary>
+        /// 目标集合存在
+        /// 重写目标集合(效果等同：删除重键)
+        /// </summary>
+        [Fact]
+        public void SortedSetCombineAndStore_HasDestination_Test()
+        {
+            //准备
+            RedisKey destinationKey = "RedisStudy:SortedSet:destination";
+            RedisKey firstKey = "RedisStudy:SortedSet:first";
+            RedisKey secondKey = "RedisStudy:SortedSet:second";
+
+            //删除旧数据
+            redisDatabase.KeyDelete(destinationKey);
+            redisDatabase.KeyDelete(firstKey);
+            redisDatabase.KeyDelete(secondKey);
+
+            SortedSetEntry[] destinationEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("destination1",1),
+                new SortedSetEntry("destination2",2),
+            };
+
+            SortedSetEntry[] firstEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("first",1),
+                new SortedSetEntry("second",2),
+                new SortedSetEntry("third",3),
+            };
+
+            SortedSetEntry[] secondEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("first",1),
+                new SortedSetEntry("third",3),
+                new SortedSetEntry("fourth",4),
+            };
+
+            redisSortedSetStudy.SortedSetAdd(destinationKey, destinationEntries);
+            redisSortedSetStudy.SortedSetAdd(firstKey, firstEntries);
+            redisSortedSetStudy.SortedSetAdd(secondKey, secondEntries);
+
+            //集合运算后，存储为目标集合(已存在的目标集合被覆盖)
+            var combineNum = redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Union, destinationKey, firstKey, secondKey, Aggregate.Sum, CommandFlags.None);
+            Assert.Equal(4, combineNum);
+
+            var destinationMembers = redisSortedSetStudy.SortedSetRangeByRankWithScores(destinationKey);
+            Assert.Equal(4, destinationMembers.Length);
+            Assert.Equal(2, destinationMembers.FirstOrDefault(m=>m.Element=="first").Score);
+            Assert.Equal(2, destinationMembers.FirstOrDefault(m => m.Element == "second").Score);
+            Assert.Equal(6, destinationMembers.FirstOrDefault(m => m.Element == "third").Score);
+            Assert.Equal(4, destinationMembers.FirstOrDefault(m => m.Element == "fourth").Score);
+
+            //目标集合再次被覆盖
+            combineNum = redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Union, destinationKey, firstKey, secondKey, Aggregate.Min, CommandFlags.None);
+            Assert.Equal(4, combineNum);
+
+            destinationMembers = redisSortedSetStudy.SortedSetRangeByRankWithScores(destinationKey);
+            Assert.Equal(4, destinationMembers.Length);
+            Assert.Equal(1, destinationMembers.FirstOrDefault(m => m.Element == "first").Score);
+            Assert.Equal(2, destinationMembers.FirstOrDefault(m => m.Element == "second").Score);
+            Assert.Equal(3, destinationMembers.FirstOrDefault(m => m.Element == "third").Score);
+            Assert.Equal(4, destinationMembers.FirstOrDefault(m => m.Element == "fourth").Score);
+
+            //清理
+            redisDatabase.KeyDelete(destinationKey);
+            redisDatabase.KeyDelete(firstKey);
+            redisDatabase.KeyDelete(secondKey);
+        }
+
+        [Fact]
+        public void SortedSetCombineAndStore_SetOperation_Test()
+        {
+            //准备
+            RedisKey destinationKey = "RedisStudy:SortedSet:destination";
+            RedisKey firstKey = "RedisStudy:SortedSet:first";
+            RedisKey secondKey = "RedisStudy:SortedSet:second";
+
+            //删除旧数据
+            redisDatabase.KeyDelete(destinationKey);
+            redisDatabase.KeyDelete(firstKey);
+            redisDatabase.KeyDelete(secondKey);
+
+            SortedSetEntry[] firstEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("first",1),
+                new SortedSetEntry("second",2),
+                new SortedSetEntry("third",3),
+                new SortedSetEntry("fourth",4),
+                new SortedSetEntry("sixth",6),
+                new SortedSetEntry("eighth",8),
+            };
+
+            SortedSetEntry[] secondEntries = new SortedSetEntry[]
+            {
+                new SortedSetEntry("first",1),
+                new SortedSetEntry("second",2),
+                new SortedSetEntry("third",3),
+                new SortedSetEntry("fifth",5),
+                new SortedSetEntry("seventh",7),
+                new SortedSetEntry("ninth",9),
+            };
+
+            redisSortedSetStudy.SortedSetAdd(firstKey, firstEntries);
+            redisSortedSetStudy.SortedSetAdd(secondKey, secondEntries);
+
+            //SetOperation.Union:并集
+            var combineNum = redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Union, destinationKey, firstKey, secondKey, Aggregate.Sum, CommandFlags.None);
+            Assert.Equal(9, combineNum);
+
+            //SetOperation.Intersect:交集
+            combineNum = redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Intersect, destinationKey, firstKey, secondKey, Aggregate.Sum, CommandFlags.None);
+            Assert.Equal(3, combineNum);
+
+            //SetOperation.Difference：差集，程序抛出异常
+            Assert.Throws<ArgumentOutOfRangeException>(() => redisSortedSetStudy.SortedSetCombineAndStore(SetOperation.Difference, destinationKey, firstKey, secondKey, Aggregate.Min, CommandFlags.None));
+
+            //清理
+            redisDatabase.KeyDelete(destinationKey);
+            redisDatabase.KeyDelete(firstKey);
+            redisDatabase.KeyDelete(secondKey);
+        }
+
+        [Fact]
+        public void SortedSetCombineAndStore_Aggregate_Test()
+        {
+
+        }
+
         [Fact]
         public void SortedSetCombineAndStoreTest()
         {
-            //redisSortedSetStudy.SortedSetCombineAndStore();
+
+        }
+
+        [Fact]
+        public void SortedSetCombineAndStore_OverLoad_Test()
+        {
+
         }
         #endregion