public static void CreatFolder(string siteUrl)//传入site url
        {
            using (SPSite site = new SPSite(siteUrl))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    SPList list = web.Lists.TryGetList("your list title");
                    if (list != null)
                    {
                        SPSecurity.RunWithElevatedPrivileges(() =>
                        {
                            web.AllowUnsafeUpdates = true;
                            SPFolder BAFolder = list.RootFolder.SubFolders.Cast<SPFolder>().
                                FirstOrDefault(f => f.Name.Equals("your folder name or root folder", StringComparison.OrdinalIgnoreCase));
                            if (BAFolder.Exists)
                            {
                                TaxonomyFieldValue taxonomyFieldValue = GetTaxonomyFieldValue(site, list);
                                for (int i = 100000; i < 101001; i++)
                                {
                                    string gvName = "GV" + i;
                                    SPListItem newItem = list.Items.Add(BAFolder.ServerRelativeUrl, SPFileSystemObjectType.Folder, gvName);
                                    newItem[SPBuiltInFieldId.ContentTypeId] = list.ContentTypes["your content type name"].Id;
                                    newItem.Update();
                                    newItem["Title"] = gvName;
                                    //为Taxonomy field 赋值
                                    newItem["your taxonomy field internal name"] = taxonomyFieldValue;
                                    newItem.Update();
                                    list.Update();

                                    //为新创建的folder指定UniqueContentTypeOrder即在new folder下只能创建UniqueContentTypeOrder中包含的contenttype类型的file or folder
                                    SPFolder gvFolder = newItem.Folder;
                                    Collection<SPContentType> gvFolderOrderedContentTypes = new Collection<SPContentType>();
                                    for (int j = 0; j < list.ContentTypes.Count; j++)
                                    {
                                        if (list.ContentTypes[j].Name == "your contenttype name")
                                        {
                                            gvFolderOrderedContentTypes.Add(list.ContentTypes[j]);
                                        }
                                    }
                                    gvFolder.UniqueContentTypeOrder = gvFolderOrderedContentTypes;
                                    gvFolder.Update();
                                }
                            }
                            web.AllowUnsafeUpdates = false;
                        });
                    }
                }
            }
        }

 private static TaxonomyFieldValue GetTaxonomyFieldValue(SPSite site, SPList list)
        {
            TaxonomySession session = new TaxonomySession(site);
            TermStore termStore = session.TermStores["Managed Metadata Service"];
            Group group = termStore.Groups["group name"];
            TermSet termSet = group.TermSets["termset name"];
            Term term = termSet.Terms["term name"];
            
            //获取TaxonomyFieldValue
            TaxonomyField taxonomyField = list.Fields["your taxonomy field name"] as TaxonomyField;
            TaxonomyFieldValue taxonomyFieldValue = new TaxonomyFieldValue(taxonomyField);
            taxonomyFieldValue.TermGuid = term.Id.ToString();
            taxonomyFieldValue.Label = term.Name;
            return taxonomyFieldValue;
        }