The construction of a healthy China has become a national strategy. The implementation of the healthy China strategy involves the wide participation of large public hospitals and grassroots public hospitals. Due to the difference of talent policy, economic base and other factors, primary medical units are not competent in their role in the implementation of healthy China strategy because of equipment allocation and talent reserve. The medical help of large public hospitals to local primary medical units has become an effective way to solve the current problems. This paper introduces the forms, requirements and objectives of the current medical support work from three aspects, emphasizes the important role and role of the party building guidance, group support and the help of the business dean in the medical assistance, and provides a certain reference for the medical support work of large public hospitals in the future.