For the mining of thin coal seams, prolonging the service life of mines, and improving the utilization rate of coal resources, screw-drilling shearers provide a good and effective choice. The 1 600 kW/3.3 kV inverter is designed for the screw-drilling shearers system and the protection level is IP56. The inverter uses a phase-shifting transformer with 18-pulse phase-shifting rectification technology to achieve no harmonic interference on the grid side. The multi-level power unit series technology is used for the topology, leading to the 13-level output with good sine degree and small du/dt value, which will not damage the cable and motor insulation. The inverter phase-shifting transformer and power unit both use water cooling heat dissipation, which has high efficiency and reliability. The performance of the inverter meets the special working conditions such as three times the starting torque, rapid acceleration, and rapid deceleration of the screw-drilling shearer. Furthermore, a remote communication interface is reserved to facilitate user’s signal control and data acquisition.