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 = ; i < ; 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 = ; 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;

        }