Dust collection blackboard rack

The invention provides a dust collection blackboard rack which comprises a rectangular box body parallel to the lower edge of a blackboard body, the box body is used for storing a proper amount of water, a small hole is formed in the top of the box body, a water outlet hole is formed in the side surface of the box body, and the inner bottom surface of the box body is an inclined surface. The chalk dust is absorbed by water when entering the box body through the small hole in the top of the box body, so that the chalk dust is effectively fixed. A piston of the water outlet hole on the side surface is opened when the dust collection blackboard rack is cleaned, the waste water with the chalk dust flows out of the water outlet hole along the inclined surface at the bottom of the box body, the waste water flowing out is received, and the device can be reused after clean water is changed through the small hole in the top.