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diff --git a/huawei/vnfmadapter/VnfmadapterService/service/src/main/java/org/onap/vfc/nfvo/vnfm/svnfm/vnfmadapter/service/csm/vnf/ScaleManager.java b/huawei/vnfmadapter/VnfmadapterService/service/src/main/java/org/onap/vfc/nfvo/vnfm/svnfm/vnfmadapter/service/csm/vnf/ScaleManager.java
new file mode 100644
index 00000000..7b0a4db6
--- /dev/null
+++ b/huawei/vnfmadapter/VnfmadapterService/service/src/main/java/org/onap/vfc/nfvo/vnfm/svnfm/vnfmadapter/service/csm/vnf/ScaleManager.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2018 Huawei Technologies Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.vfc.nfvo.vnfm.svnfm.vnfmadapter.service.csm.vnf;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.vfc.nfvo.vnfm.svnfm.vnfmadapter.common.restclient.SystemEnvVariablesFactory;
+import org.onap.vfc.nfvo.vnfm.svnfm.vnfmadapter.service.constant.Constant;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.sf.json.JSONArray;
+import net.sf.json.JSONException;
+import net.sf.json.JSONObject;
+
+/**
+ * <br>
+ * <p>
+ * </p>
+ * 
+ * @author
+ * @version     VFC 1.0  2018年5月17日
+ */
+public abstract class ScaleManager {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ScaleManager.class);
+
+    private static String VM_IDS_PATH =
+            SystemEnvVariablesFactory.getInstance().getAppRoot() + System.getProperty(Constant.FILE_SEPARATOR) + "etc"
+                    + System.getProperty(Constant.FILE_SEPARATOR) + "vnfpkginfo"
+                    + System.getProperty(Constant.FILE_SEPARATOR) + "vms" + System.getProperty(Constant.FILE_SEPARATOR);
+
+    public static void beforeScaleOut(JSONObject queryVms, String vnfId) {
+        try {
+            JSONArray vms = queryVms.getJSONObject("data").getJSONArray("vms");
+            writeVmIdsToFile(vnfId, vms);
+        } catch(JSONException e) {
+            LOG.error("function=beforeScaleOut, msg=recode current vms JSONException");
+        }
+    }
+
+    public static JSONArray beforeScaleIn(JSONObject queryVms, String vnfId) {
+        JSONArray vmList = new JSONArray();
+        try {
+            JSONArray vms = queryVms.getJSONObject("data").getJSONArray("vms");
+            JSONArray recodeVms = readVmIdsFile(vnfId);
+            if(!recodeVms.isEmpty()) {
+                for(int i = 0; i < vms.size(); i++) {
+                    JSONObject obj = vms.getJSONObject(i);
+                    String vmId = obj.getString("id");
+                    if(isScaleOutVm(recodeVms, vmId)) {
+                        JSONObject vmIdObj = new JSONObject();
+                        vmIdObj.put("vm_id", vmId);
+                        vmList.add(vmIdObj);
+                    }
+                }
+            }
+        } catch(JSONException e) {
+            LOG.error("function=beforeScaleIn, msg=recode current vms JSONException");
+        }
+        return vmList;
+    }
+
+    private static boolean isScaleOutVm(JSONArray recodeVms, String vmId) {
+        for(int i = 0; i < recodeVms.size(); i++) {
+            JSONObject obj = recodeVms.getJSONObject(i);
+            String oldVmId = obj.getString("id");
+            if(oldVmId.equalsIgnoreCase(vmId)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private static String getVmIdsFilePath(String vnfId) {
+        return VM_IDS_PATH + vnfId + ".json";
+    }
+
+    private static void writeVmIdsToFile(String vnfId, JSONArray vms) {
+        String filePath = getVmIdsFilePath(vnfId);
+        FileOutputStream outStream = null;
+        try {
+            File destFile = FileUtils.getFile(filePath);
+
+            File parentFile = destFile.getParentFile();
+            if(parentFile != null) {
+                if(!parentFile.mkdirs() && !parentFile.isDirectory()) {
+                    throw new IOException("Destination '" + parentFile + "' directory cannot be created");
+                }
+            }
+            if(!destFile.exists()) {
+                destFile.createNewFile();
+            }
+            outStream = new FileOutputStream(destFile);
+            outStream.write(vms.toString().getBytes());
+        } catch(IOException e) {
+            LOG.error("function=writeVmIdsToFile, msg=write vms to file ioexception, e : {}", e);
+        } finally {
+            IOUtils.closeQuietly(outStream);
+        }
+    }
+
+    private static JSONArray readVmIdsFile(String vnfId) {
+        String filePath = getVmIdsFilePath(vnfId);
+        InputStream ins = null;
+        BufferedInputStream bins = null;
+        String fileContent = "";
+        try {
+            ins = FileUtils.openInputStream(FileUtils.getFile(filePath));
+            bins = new BufferedInputStream(ins);
+
+            byte[] contentByte = new byte[ins.available()];
+            int num = bins.read(contentByte);
+
+
+            if(num > 0) {
+                fileContent = new String(contentByte);
+            }
+
+            if(StringUtils.isNotEmpty(fileContent)) {
+                return JSONArray.fromObject(fileContent);
+            }
+        } catch(IOException e) {
+            LOG.error("function=readVmIdsFile, msg=read vms from file IOException, filePath : {}", filePath);
+        } catch(JSONException e) {
+            LOG.error("function=readVmIdsFile, msg=read vms from file JSONException, fileContent : {}", fileContent);
+        } finally {
+            IOUtils.closeQuietly(bins);
+            IOUtils.closeQuietly(ins);
+        }
+        return new JSONArray();
+    }
+}