The present invention relates to a chemical solution spraying system, which is provided at places where crops are cultivated in a wide space such as a vinyl greenhouse and the like, to spray a chemical solution to crops. More specifically, the chemical solution spraying system comprises: a control unit (100) an air supply unit (200) including an air control box (201) for distributing air supplied through a compressor (110) to a first air supply pipe (203) and a second air supply pipe (204), and an air valve (202) provided in the second air supply pipe (204) to distribute air to the second air supply pipe (204) and a third air supply pipe (205) a chemical solution supply unit (300) including a chemical solution container (3102) for storing a chemical solution, a motor pump (302) for discharging the chemical solution stored in the chemical solution container (301), a chemical solution distributor (303) for distributing the chemical solution supplied from the motor pump (302), and a chemical solution supply pipe (304) through which the chemical solution discharged from the chemical solution distributor (303) flows and a chemical solution sprayer (400) for receiving the air from the air supply unit, receiving the chemical solution from the chemical solution supply unit (300), storing the same, and then repetitively performing the operation of spraying the chemical solution and the operation of blocking the chemical solution and washing with air. According to the present invention, the chemical solution is sprayed and the chemical solution sprayer is periodically washed by an unmanned system, such that nozzles and the like can be prevented in advance from being clogged due to the chemical solution. In addition, the chemical solution can be more efficiently sprayed over a wide range of areas by effectively controlling a plurality of chemical solution sprayers.본 발명은 비닐하우스 등과 같이 넓은 공간에서 작물을 재배하는 곳에 비치해 작물에 약액을 분무하는 약액분무 시스템에 관한 것으로 보다 상세하게는,제어부(100)와 콤프레샤(110)를 통해 공급되는 에어를
