The utility model relates to a centralized refueling device for a coal mining machine, which mainly solves the technical problems of the pollution of lubricating oil storage chambers of a cutting part and a traction part of the coal mining machine and the like. The technical scheme adopted by the device is that the device is provided with a two-position three-way change valve which is connected with a height adjusting system main loop and a pump motor assembly respectively, the pump motor assembly is connected with a refueling tank and a rotary valve respectively, the rotary valve is provided with a group of oil filling pipes, and each of the oil filling pipes is connected with a corresponding lubricating oil storage chamber respectively. The centralized refueling device for the coal mining machine is suitable for oil filling for all the independent lubricating oil storage chambers of the cutting part and the traction part of the coal mining machine.