Garbage crushing device for construction

The utility model relates to the technical field of construction waste crushing, and particularly provides a construction waste crushing device which comprises a crushing shell provided with a feeding hole and a discharging hole, the first crushing unit is mounted in the crushing shell and is arranged between the feeding hole and the discharging hole; the air inlet pipe is fixed to the outer side of the crushing shell in a surrounding mode, communicates with the interior of the crushing shell and is arranged between the feeding port and the first crushing unit; the air guide cover is fixedly connected to the interior of the crushing shell and used for changing the direction of airflow blown into the crushing shell by the air inlet pipe and controlling the direction of the airflow blown to the discharge port; according to the building rubbish smashing device, flying dust generated when building rubbish is smashed can be effectively improved, so that the working environment is improved, and the health of worker