Fish larva collecting device for main stream of Yellow River

The larval fish collecting device comprises a collecting head, a collecting box, a drainage end and a support, the collecting head and the drainage end are arranged on the left side and the right side of the collecting box respectively, the support is further arranged on the collecting box, the collecting head is a conical barrel, and the large end of the conical barrel is provided with a porous conical cover which gathers towards the direction away from the conical barrel. The small end of the conical barrel is communicated with a water inlet pipe of the collection box, the drainage end is a drainage pipe opposite to the water inlet pipe on the collection box, a flowmeter and an axial flow pump are arranged at the end, away from the collection box, of the drainage pipe, and a one-way self-closing structure and a larval fish filtering conical barrel are arranged in the collection box and correspondingly communicated with the water inlet pipe and the drainage pipe; induction cylinders are arranged on the front