In order to solve the problems of traditional fuse setback arming, such as complex structure, large volume and high cost, which can not meet the low overload environment, a new arming scheme based on inertia switch, arming control circuit and pin puller is proposed. Through the platform of three-dimensional modeling software, circuit simulation software and dynamics simulation software, a kind of fuse primary protection and release technology scheme of inertial environment identification is designed, which solves the problem that the fuse uses the launch overload to realize the protection and release under the condition of extremely low overload. The simulation results show that the scheme can adapt to the identification requirements of the arming environment under the condition of low overload, ensure the service safety and launch safety of the fuse, and solve the adaptability problem of the inertia safety of the ammunition launched under the condition of very low overload.