The planing depth adjusting mechanism is composed of an adjusting handle, a locking spring, a front base plate, etc. Turn the adjusting handle to move the front base plate up and down to adjust the planing depth. The output shaft of the motor drives the planer on the nylon drive belt drive cutter shaft for planing operation. The power cord adopts a double core sheathed flexible cable, which forms a non reconnectable plug with a double post rubber plug as a whole.