Collecting device for crushed metal parts on construction site

The invention relates to the technical field of construction equipment, in particular to a collecting device for fine crushed metal parts on a construction site, a front collecting and separating box is placed on a plate trailer, a suction pipe is arranged at the front end of the front collecting and separating box, and a dust collector is connected to the rear of the front collecting and separating box through a soil outlet pipe; the soil outlet pipe is installed on the front collecting and separating box through a pipe supporting piece, the dust collector is also placed on the plate trailer, and a storage battery is further placed on the plate trailer. The front collecting and separating box is arranged, so that sand and finely-crushed metal parts can be separated, the sand enters the dust collector from the soil outlet pipe through the isolating screen, the finely-crushed metal parts are left in the front collecting and separating box, and the structure of the pipe supporting piece can reduce construction