Through the analysis of the problems in the power supply system of the high voltage long distance and large load fully mechanized mining equipment of the 68309 working face in Du'erping Coal Mine, the corresponding power distribution solutions are proposed for different electromechanical equipment, including soft start technology and improvement，power supply voltage level, frequency control, etc. These power distribution solutions have achieved the expected results in the actual work process, ensuring the reliability of the power supply and the normal operation of the equipment.