Pomacea canaliculata intercepting and capturing device for field irrigation water

The utility model provides a field irrigation water ampullaria gigas intercepting and catching device. The field irrigation water ampullaria gigas intercepting and catching device comprises a fixed insertion rod (10), a trap (20) and a sealing cover (30). A cavity (11) is formed in the middle of the fixed insertion rod (10), a collecting net bag (12) is arranged on the side wall of the top of the cavity (11), and the top end of the fixed insertion rod (10) is connected with the bottom end of the trap (20); the longitudinal section of the trap (20) is of a big-end-down conical structure, a plurality of movable door installation openings (21) are formed in the outer wall of the trap (20), movable doors (22) are rotationally arranged on the inner walls of the movable door installation openings (21) respectively, and the weight of the lower ends of the movable doors (22) is larger than that of the upper ends of the movable doors (22). The upper end of the trap (20) is connected with the lower end of the sealing c