According to analysis of released information of WeChat official accounts of 31 Provincial Libraries，it can be found that provincial public libraries have begun to pay attention to the release of volunteer service information and have enhanced their influence through this self-media platform presently.However most failed to fully present the development of volunteer service activities，forms and contents of information release are relatively simple，many information does not clearly distinguish services between cultural volunteer services and library staff services，and there is a big difference between the eastern and the central and western regions.In order to make WeChat official accounts function as a platform sharing volunteer service information and developing a digital service，it's necessary to combine the characteristics of this medium，further clarify the scope of volunteer service，enhance cultural volunteer service results display，enhance interaction with readers，promote libraries to make better use of WeChat platform to improve people's understanding of cultural volunteer service and attract more public participation in cultural volunteer service.