Pesticide spraying device for preventing and treating corn diseases and insect pests

The utility model discloses a corn pest control pesticide spraying device which comprises a bearing plate, the top of the bearing plate is fixedly connected with a pesticide spraying box, the outer side wall of the pesticide spraying box is fixedly connected with a first branch pipe, the tail end of the first branch pipe is fixedly connected with a transfer pump, and a water outlet of the transfer pump is fixedly connected with a second branch pipe. The tail end of the second branch pipe is connected with a first mounting sleeve head through a telescopic hose. According to the utility model, the second mounting plug is pulled to be inserted into or separated from the first mounting sleeve head, and then the connecting sleeve block on the first mounting sleeve head is inserted into or separated from the adjusting insertion strip on the second mounting plug, so that the adjusting clamping hook on the adjusting insertion strip is conveniently inserted into or separated from the connecting clamping groove in the