Teaching blackboard convenient to clean

The invention discloses a teaching blackboard convenient to clean. The teaching blackboard convenient to clean comprises an outer plate, wherein a switch panel and an air pump are arranged at the middle part and the bottom part of one side of the outer plate; a water inlet valve is arranged at the top part of the other side of the outer plate; a waste water recycling bin is arranged at the bottom part of the outer plate; a water outlet valve is arranged at one end of the waste water recycling bin; an inner plate tank is arranged in the middle of sides of the outer plate; an inner plate is arranged in the inner plate tank; and a spray pipe is arranged at the surface of the outer plate at the top part of the inner plate tank. According to the teaching blackboard convenient to clean provided by the invention, the spray pipe, spray headers, a cleaning plate, a cleaning brush, a slide chute and a slide block are arranged, so that when the blackboard needs to be cleaned, the water inlet valve is opened to feed wate