Abstract: Based on analyzing the mathematical model of asynchronous motor and the principle of vector control, this paper uses Matlab/Simulink software, and builts the asynchronous motor vector control simulation system. The simulation system which adopts the idea of modular established flux estimation module, MT-abc coordinate transformation module and hysteresis current control module, the organic connection of each module and the corresponding unit, constitute a simulation model of asynchronous motor vector control which is based on rotor flux orientation. The simulation results show that the control system is feasible and effective, has certain significance for the development and research of AC speed regulating system, which can provide reference for the study of asynchronous motor vector control.