Agricultural non-point source pollution (ANPSP) gets seriously in recent years and it’s study in small watershed has become a hotspot. This study evaluates the status of ANPSP and analyzes the mechanism and characteristics of ANPSP in small watershed, taking Laixi River (Lu’ territory) as an example. Then focus on studying the control countermeasures of ANPSP in small watershed, proposing the control measures for Laixi River (Lu’ territory).