To solve the problems of high cost, slow development speed and complex test conditions of the guided projectile fuze, a simulation test projectile was designed based on the standard grenade, which is used to simulate the launching environment of the fuze. Since the speed of test projectile is low under the condition of not using the tail fin, the flying stability of the projectile within the muzzle distance from 200 meters to 300 meters needs to be considered. In flight, because the resistance direction is not consistent with the direction of the center of mass movement, the resultant force does not necessarily pass through the centroid, forcing the projectile to rotate in the air, so the rotation speed and aerodynamic shape design of the projectile body is the necessary condition for the projectile flight stability. The flight stability of the projectile within a certain distance is calculated, the stability simulation analysis is carried out with the numerical calculation results, and the numerical simulation calculation can provide effective reference for the projectile aerodynamic shape design.