Fruit tree insecticide injection device

A fruit tree insecticide injection device comprises a liquid storage bottle, a bottle cover, a water guiding pipe and injection linings. The fruit tree insecticide injection device is characterized in that the liquid storage bottle is a PET plastic bottle, the bottle cover is a spiral cover, a valve core, a safety valve and a water guiding core are arranged on the bottle cover, and an outer casing pipe, a main water guiding pipe, a branch water through cabinet, branch water guiding pipes and the injection linings are connected with the water guiding core in sequence. The liquid storage bottle is the PET plastic bottle and can be placed on the ground, and insecticide in the bottle flows into a tree body through air pressure formed by liquid level pressurizing. The safety valve capable of pressure adjusting is arranged on the bottle cover, and operation safety of an inflation process is guaranteed. The main water guiding pipe is connected with the branch water through cabinet, the insecticide flows into the mul