White board capable of performing automatic erasure

The invention provides a white board capable of performing automatic erasure and belongs to the field of white boards. The white board capable of performing automatic erasure comprises a white board body, wherein a frame is arranged on the periphery of the white board body, the white board body is installed on a support, linear motor tracks and straight rod board erasers are arranged on the frames on two sides of the white board body, two ends of each straight rod board eraser are installed on active cells of two linear motors, a travel switch and a travel switch B are arranged on a top frame and a bottom frame of the white board body respectively, one end of the travel switch and one end of the travel switch B are connected to a power supply, the other end of the travel switch and the other end of the travel switch B are connected to the input end of a control device, the output end of the control device is connected to a forward electric operating end and a reverse electric operating end of a linear motor controller, the control device is connected to the power supply through a switch, the white board is erased completely and thoroughly, and a speaker does not need to stop teaching for erasure.