The invention relates to a flat scaffold for coal mines. The flat scaffold comprises a scaffold platform which is fixed to basic discs through a plurality of vertical rods, the base discs are divided into two groups corresponding to coal mine roadway rails, each group of the base discs is provided with a flat vehicle with wheels, a group of steel channels is arranged on each of side edges parallel to the coal mine roadway rails, of the plate of the flat vehicle and comprises two groove channels distributed on the upper and lower surfaces of the flat vehicle, the groove channels are fixed to the plate of the flat vehicle, and the vertical rods are connected to the groove channels on the upper surface of the plate of the flat vehicle. According to the flat scaffold, the existing rails of the coal mine roadways are utilized well, and the entire movements of a scaffold can be performed easily.