The stall phenomenon which happens in loaded motor is unqualification in application.Meanwhile it may measure the maximum property of motor in manufacture.So the phenomenon is analyzed to find a simulation of electrical state to predict the maximum currency and torque which is a necessary method to be proceeded up to now before design.We find that the simulation fits well to the reference.The conditions of t=6s,U=12V result in the biggest stall force according to rotation to change time and voltage.Then it is t=8s,U=10V;t=10s,U=8V and t=12s,U=6V in turns.As for torque it is t=6s,U=12V;t=8s,U=10V;t=6s,U=12V and t=12s,U=6V in truns.