Controllable formula blackboard eraser of integration

The utility model provides a controllable formula blackboard eraser of integration, including guide rail, chain chain wheel group and blackboard eraser device to and transmission, be provided with the guide slot on the guide rail, be provided with the rack of cockscomb structure in the guide slot, chain chain wheel group includes the fixed chain wheel of two fixed mounting on the blackboard and the chain that meshes with two fixed chain wheel, and fixed chain wheel is connected with the rolling disc, transmission includes walking gear and walking sprocket, and a walking gear drive gear connects, and the walking sprocket is connected with the 2nd drive gear, and the transmission is connected between a drive gear and the 2nd drive gear, and hair brush teeth wheel blackboard eraser device is connected, and the blackboard eraser device includes the brush holder and set up the brush hair on the brush holder that second fixed axle, third fixed axle and fourth fixed axle all pass through the bearing with the riser a