In order to help the managers and investors of small hydropower enterprises systematically master the relevant laws, regulations, knowledge and skills of grid-connected operation of small hydropower stations, guide small hydropower stations to improve their daily power generation, operation and maintenance levels, enhance their ability to troubleshoot accurately and quickly, and improve the safe and stable operation level of power systems, a book "Guide Manual for Grid-connected Operation of Small Hydropower Stations in Southern China" was compiled. This book consists of seven chapters, the main contents are as follows: The first chapter is an overview of small hydropower stations, introducing the types and production processes of hydropower stations; Chapter 2: Grid-connected operation of hydropower stations, which introduces some common scheduling terms such as power generation business license, grid-connected conditions, grid-connected protocols, grid-connected operation scheduling and grid-connected scheduling of hydropower stations. The third chapter introduces the safety in flood season and the operation and maintenance of hydraulic structures. Chapter 4: Operation and maintenance of hydro-generator set, introducing basic requirements, operation and maintenance of hydro-turbine, operation and maintenance of generator and auxiliary equipment; The fifth chapter introduces the operation and maintenance of power transformation and distribution equipment. The sixth chapter introduces the management of small hydropower stations, including organization management, safety management, production management, technology management, equipment and spare parts management. The seventh chapter introduces the safe use of common machines and tools in hydropower stations, the safe use of cranes and the safety requirements of welding operations. Finally, the laws, standards, rules and regulations that should be prepared for small hydropower stations are attached, as well as an example of grid-connected operation of small hydropower stations. This book is a practical skill training textbook for investors, managers and operation and maintenance personnel of small hydropower stations.