Abstract: Power tools，including garden tools and small farm tools，are widely used in agricultural machinery，horticulture and other fields.Even the fast development of power tool industry processing，measurement level of power tools is low.An automatic on-line monitoring and management system for small power tools.By using industrial computer and digital signal processing unit，a multi item measuring equipment with pressure，no-load and spark monitoring was integrated.The utility model has advantages of high speed，high precision，strong stability，convenient use，etc.Utility model was an automatic on-line detecting and testing device for power tools.