The utility model discloses an inserted slip for preventing and treating plant diseases and pests. The inserted slip comprises a cone-shaped end part, a body part, a rubber ball part, a liquid medicine tube, a handle and a sealing sleeve, wherein the cone-shaped end part is located at the left end of the body part; the rubber ball part is located at the right end of the body part; the liquid medicine tube is located at the right end of the rubber ball part; the handle is located at the right end of the liquid medicine tube; the body part, the rubber ball part, the liquid medicine tube and the handle are sequentially connected; the cone-shaped end part is movably connected with the body part; a mounting hole is formed in the cone-shaped end part; a mounting bulge matched with the mounting hole is arranged on the body part. According to the utility model, the cone-shaped part is replaceable when being damaged, so that the service life of the inserted slip is prolonged; impurities can be filtered due to the arrangement of a screen frame, so that the effects of prevention and treatment are good.