Insecticidal device for plant protection

The invention relates to an insect killing device for plant protection, which belongs to the technical field of insect killing instruments and comprises a hoop type mounting pipe, a U-shaped connecting frame arranged on the outer side of the hoop type mounting pipe, a support arm arranged on one side, far away from the hoop type mounting pipe, of the U-shaped connecting frame, two first connecting rods arranged on one side of the support arm respectively, and two second connecting rods arranged on the other side of the support arm respectively. The two ploughing teeth are symmetrically arranged at the ends, away from the supporting arm, of the first connecting rods, the mulching film roll is arranged between the two first connecting rods, and the mulching film roll is rotationally connected with the first connecting rods; the device can be fixed to the bottom of a trunk of a fruit tree plant through the hoop type mounting pipe, then the supporting arm and the U-shaped connecting frame are used in cooperation,