Efficient-braking stable coal mining machine

The invention discloses an efficient-braking stable coal mining machine. The efficient-braking stable coal mining machine comprises cutting units arranged on the two sides of the efficient-braking stable coal mining machine, a traction unit connected with the cutting units, a spraying cooling unit arranged inside a first traction part, and a hydraulic braking device arranged inside the traction unit. Through a first traction adjusting piece and a second traction adjusting piece which are arranged on the hydraulic braking device, a traction pressing piece and a rotating shaft can be adjusted oppositely, the braking effect is improved effectively, the time and labor are saved, and the coal mining efficiency is improved; and meanwhile, rocking arm connecting parts, rocking arm fastening partsand rocking arm limiting parts are arranged in the positions, connected with water pipes, of a rocking arm cooling assembly so that connection loosening of the water pipes and heat exchange pieces inoperation of the coal min