Based on hybrid stepping motor drive a type of air tankers refueling-pod ram air turbine work process, analysis of the stepper motor structure and use features, summarizes many elements under the influence of how to improve the stepping motor characteristic. Focus on the analysis to the influences of the characteristic of motor deceleration/slow curve and fine fraction. The results show that the motor can effectively resolve new motor high temperature resistant, small volume, light weight, low consumption, great torque, and high control precision and response speed problems.