The invention discloses a movable type flat plate paint brushing machine. The movable type flat plate paint brushing machine comprises a movable rack, wherein movable roller bodies are mounted on thebottom end of the movable rack; a hydraulic lifting table is arranged at the upper end of the movable rack; one end of the upper-end table board of the hydraulic lifting table is equipped with a paintbrushing base; a paint rolling base is arranged at the other end of the upper-end table board of the hydraulic lifting table; a concave paint filling slot is formed in the center of the paint brushing base; a fixed frame is vertically arranged at the upper end of the concave paint filling slot; a rotary drive motor is fixedly mounted at the inner side end of the fixed frame; the output end of therotary drive motor is connected and equipped with a paint brushing roller; and the bottom end of the paint brushing roller is guided into the concave paint filling slot. In this way, the paint brushing roller can be driven by the rotary motor to continuously take out and brush pigment paint liquid onto the board surface of an upper-end board; and the paint rolling base at the rear end of the paint brushing base can roll, brush and flatten the board surface brushed with the paint liquid through the flattening roller.