Abstract: Abstract：Aiming at the large impact of coal mine underground transportation equipment, low operating efficiency and serious waste of power, this paper designs a mine high-voltage inverter based on three-level slip vector control. The inverter adopts 12-pulse rectification circuit and diode clamped inverter circuit. The inverter voltage waveform is modulated by the carrier in-phase stacking, and the vector control scheme based on the slip frequency is selected. The speed control performance of the motor is analyzed by constructing the Simulink system model of high-voltage motor variable frequency speed regulation. The results show that the motor can respond quickly to load changes and reach a stable state, and the system has high robustness.