Blackboard eraser with dust removal function

The invention relates to a blackboard eraser with the dust removal function. The blackboard eraser comprises a shell with the bottom open, a rotary shaft vertically disposed in the shell, blades arranged on the rotary shaft, and an erasing disc arranged at the lower end of the rotary shaft. A filter net is horizontally disposed in the shell and divides the interior of the shell into a dust collecting cavity and an air-induced cavity from bottom to top; the blades are located in the air-induced cavity; and an annular air outlet is formed in the bottom edge of the shell and communicates with theair-induced cavity through an air-induced channel. The blackboard eraser is combined with the wiping function, the dust sucking function and the dust retardation function to thoroughly and rapidly clean a blackboard, the erasing disc driven by a motor to perform eccentric rotation so as to rapidly clean the blackboard, the cleaning efficiency is high, time and labor are saved, an annular air curtain is formed at the air