Construction waste crusher and use method thereof

The invention belongs to the technical field of constructional engineering equipment, and particularly relates to a construction waste crusher which comprises a crusher body, a feeding port is formed in the top of the crusher body, and a crushing cavity and a crushing roller are arranged in the crusher body; the conveying mechanism comprises a conveying belt arranged at the bottom of the crushing machine body; the driving mechanism is arranged on one side of the crushing machine body, and the driving mechanism comprises a driving shaft used for driving the crushing rollers and a driving machine; the control unit is arranged on the crusher body; the dust collecting mechanism is arranged on one side of the crushing machine body, and the dust collecting mechanism comprises a dust collecting box communicating with the crushing cavity; dust generated in the crushing cavity can be collected into a dust collecting box of the dust collecting mechanism, the dust can be effectively prevented from escaping into the work