The invention discloses a manual charging device and method for a coal mining machine. The manual charging device comprises a shell, shell end covers, rotating shaft end covers, antifriction bearings, a coil spring, a draw cord, a rotating shaft, circuit boards, an accumulator and a permanent magnet. The rotating shaft end covers are arranged at the two ends of the rotating shaft inside the shell respectively. The two shell end covers are arranged at the two ends of the shell and used for positioning the two antifriction bearings. The circuit boards and the accumulator are arranged inside the shell. The circuit boards are connected with the accumulator. Each circuit board comprises a rectifying circuit and a filter circuit, wherein the rectifying circuits, the filter circuits and the accumulator are connected in sequence. The permanent magnet is arranged inside the shell and used for providing a magnetic field. The draw cord is connected with the rotating shaft. The coil spring is installed at the position, on the inner sides of the antifriction bearings, outside the rotating shaft. According to the manual charging device and method for the coal mining machine, long-time stable electricity can be provided for related devices of the coal mining machine, so that the service time of the devices is prolonged.