Flat plate sander

The invention relates to a flat plate sander. The flat plate sander comprises a plug, a sander shell, a rotor, a stator, a base plate, a switch and a dust absorption box, wherein the rotor and the stator are arranged on the sander shell through a first bearing and a second bearing, a carbon brush and a brush box corresponding to the carbon brush are arranged on two sides of the rotor, an inductance wire which is controlled by a speed regulating circuit board is connected on the carbon brush, a first fan blade is arranged at the upper end of the second bearing, a second fan blade is arranged at the lower end of the second bearing, the base plate is connected with the sander shell through a swinging support, a lining plate is arranged in the base plate, a third bearing is arranged on the base plate, the third bearing is matched with the second bearing, the dust absorption box is connected with the swinging support through a dust absorption connecting sleeve, dust absorption bags which are connected with one ano