The utility model relates to the technical field of
building material smashing, in particular to a
building material smashing device which comprises a smashing box, a first smashing roller set and a second smashing roller set are arranged on the smashing box, a
slag discharging
pipe and a bottom supporting plate are arranged at the bottom of the smashing box, a valve is arranged on the
slag discharging
pipe, and a mounting plate is arranged on the bottom supporting plate. Moving wheels are arranged on the mounting plate, a box cover covers the crushing box, bolts and a feeding
pipe are arranged on the box cover, an auxiliary dust suction pipe is connected to the feeding pipe, a dust storage box, a suction pump and a
control switch are arranged on the box cover, a suction pipe and an
exhaust pipe are arranged on the suction pump, a box cover plate and a main dust suction pipe are arranged on the dust storage box, and a vertical
branch suction pipe is connected to the main dust suction pipe. A screw pin is arranged on the box cover plate, and a push
handle is arranged on the smashing box. The dustproof performance of the feeding pipe on the smashing device for the building
cement brick waste is improved, the situation that the whole smashing box directly occupies the
working environment space is avoided, and the anti-skid stability is improved when the pushing
handle is held by a hand pushing the smashing box.