Chironomidae larva collection system and use method

The invention belongs to the technical field of environment monitoring, and discloses a chironomidae larva collecting system and a using method.The chironomidae larva collecting system comprises a water diversion pipe, a rotary lifting type special-shaped pipe, a trapper, a vacuum suction separator, a flushing bin and a collector, a collecting assembly comprises a filter screen, a drilling plate and a side coaming, and the hole diameter of the drilling plate is larger than that of the filter screen; the filter screen and the drilling plate are sealed through the side surrounding plate, and the drilling plate is located below the filter screen. By means of the living habits of benthic surface layers and shallow layers of chironomidae larvae, separation shovels of mud inserting push plates are arranged, sludge which is separated and shoveled up is dispersed through a backwater washing pipe, suction is facilitated, meanwhile, the number of collected non-target objects is reduced, damage to the ecological environ