In order to improve the stability of the movement mechanism, stepper motor driver usually uses current subdivision method, by which a step angle is divided into several small steps. In order to realize the current subdivision drive of the stepper motor, the usual method is use the current loop control system, thereby increasing the current sampling, comparison and other hardware and software modules. The increase in complexity leads to the decrease of the reliability of drive products. In order to improve the reliability of aerospace stepper motor drive control system, a pure openloop drive design based on antifuse FPGA was proposed. By means of the preset duty cycle, the current subdivision of the stepping motor was realized without introducing the current loop. The validity of the design was verified by the prototype test, which could provide reference for the followup aerospace project.