diff --git a/services/updater_binary/update_partitions.h b/services/updater_binary/update_partitions.h
index a8128f5d8ab1ed142b640c295f52d68307f63b0f..8a583bbcf008df126e175a67c78efb919c9ba26f 100644
--- a/services/updater_binary/update_partitions.h
+++ b/services/updater_binary/update_partitions.h
@@ -27,7 +27,11 @@ public:
     UpdatePartitions() {}
     virtual ~UpdatePartitions() {}
     int32_t Execute(Uscript::UScriptEnv &env, Uscript::UScriptContext &context) override;
+#ifndef UPDATER_UT
 private:
+#else
+public:
+#endif
     int ParsePartitionInfo(const std::string &partitionInfo, PartitonList &newPartList) const;
     int DoNewPartitions(PartitonList &newPartList);
     bool SetPartitionInfo(const cJSON* partitions, int idx, struct Partition* myPartition) const;
diff --git a/test/unittest/updater_binary/update_partitions_unittest.cpp b/test/unittest/updater_binary/update_partitions_unittest.cpp
index 157c727c0beb0dcce14e718fc8d9df8326acbcc2..8b17113c986ecb0af97c5d33ba07c3e7112c1c29 100755
--- a/test/unittest/updater_binary/update_partitions_unittest.cpp
+++ b/test/unittest/updater_binary/update_partitions_unittest.cpp
@@ -28,6 +28,9 @@
 #include "unittest_comm.h"
 #include "update_processor.h"
 #include "utils.h"
+#include "cJSON.h"
+#include "fs_manager/partitions.h"
+#include "update_partitions.h"
 
 using namespace Updater;
 using namespace testing::ext;
@@ -99,4 +102,104 @@ HWTEST_F(UpdatePartitionsUnitTest, UpdatePartitions_Unitest02, TestSize.Level1)
     PkgManager::ReleasePackageInstance(pkgManager);
     EXPECT_EQ(partRet, USCRIPT_SUCCESS);
 }
+
+HWTEST_F(UpdatePartitionsUnitTest, UpdatePartitions_Unitest04, TestSize.Level1)
+{
+    const char *partitionInfo = R"(
+    {
+        "disk": "sda",
+        "partition": [
+            {
+                "nostart": 512
+            },
+            {
+                "start": 32
+            },
+            {
+                "start": 32,
+                "length": 1
+            },
+            {
+                "start": 32,
+                "length": 1,
+                "partName": "cust"
+            }
+        ],
+        "sector_size": 4096
+    }
+    )";
+    cJSON *root = cJSON_Parse(partitionInfo);
+    if (root == nullptr) {
+        cout << "cJSON_Parse error" << endl;
+        return;
+    }
+    cJSON *partitions = cJSON_GetObjectItem(root, "Partition");
+    if (partitions == nullptr) {
+        cout << "cJSON_GetObjectItem error" << endl;
+        cJSON_Delete(root);
+        return;
+    }
+    struct Partition *myPartition = static_cast<struct Partition*>(calloc(1, sizeof(struct Partition)));
+    if (!myPartition) {
+        cout << "calloc error" << endl;
+        cJSON_Delete(root);
+        return;
+    }
+ 
+    UpdatePartitions partition;
+    EXPECT_TRUE(!partition.SetPartitionInfo(partitions, 10, myPartition)); // 10: error index
+    EXPECT_TRUE(!partition.SetPartitionInfo(partitions, 0, myPartition)); // 0: error start
+    EXPECT_TRUE(!partition.SetPartitionInfo(partitions, 1, myPartition)); // 1: error length
+    EXPECT_TRUE(!partition.SetPartitionInfo(partitions, 2, myPartition)); // 2: error partName
+    EXPECT_TRUE(!partition.SetPartitionInfo(partitions, 3, myPartition)); // 2: error fstype
+    free(myPartition);
+    cJSON_Delete(root);
+}
+ 
+HWTEST_F(UpdatePartitionsUnitTest, UpdatePartitions_Unitest05, TestSize.Level1)
+{
+    const char *noPartitionInfo = R"(
+    {
+        "disk": "sda",
+        "partitionx": [
+            {
+                "nostart": 512
+            }
+        ],
+        "sector_size": 4096
+    }
+    )";
+    const char *partitionInfo = R"(
+    {
+        "disk": "sda",
+        "partition": [
+            {
+                "nostart": 512
+            }
+        ],
+        "sector_size": 4096
+    }
+    )";
+    const char *partitionInfoNew = R"(
+    {
+        "disk": "sda",
+        "partition": [
+            {
+                "nostart": 512
+            },
+            {
+                "start": 512
+            }
+        ],
+        "sector_size": 4096
+    }
+    )";
+ 
+    PartitonList newPartList {};
+    UpdatePartitions partition;
+    EXPECT_TRUE(partition.ParsePartitionInfo("test", newPartList) != 1); // error root
+    EXPECT_TRUE(partition.ParsePartitionInfo(std::string(noPartitionInfo), newPartList) != 1); // error partitions
+    EXPECT_TRUE(partition.ParsePartitionInfo(std::string(partitionInfo), newPartList) != 1); // error number
+    EXPECT_TRUE(partition.ParsePartitionInfo(std::string(partitionInfoNew), newPartList) != 1); // error number
+}
 } // namespace updater_ut