The present invention relates to an automatic spraying system capable of automatically removing clogging of an injection nozzle and a filter for supplying foreign matter to the outside by discharging foreign substances to be supplied to the injection nozzle, the injection filter and the suction filter by supplying compressed air, A suction filter which is inserted into a reservoir storing liquid such as pesticide or water to suck a liquid by filtering foreign matter, and connected to a suction pipe through which the sucked liquid flows and an injection pipe through which external air is injected； A spray unit connected to the suction pipe of the suction filter to suck the liquid and supply the liquid to the first valve unit through the flow pipe； A first valve part for flowing or blocking the liquid supplied from the atomizing part to the injection filter side； A spray filter for filtering the liquid flowing through the first valve portion to remove foreign substances that may flow into the first valve portion； A distributor for distributing the liquid to be filtered and flowing through the injection filter to a plurality of spray nozzles； A plurality of spray nozzles for spraying the liquid supplied through the distributor to plants； A compressor for supplying compressed air through a control signal connected to the injection filter and the suction filter to be set or input to the control unit, and a control unit for controlling the spray unit, the first valve unit, the second valve unit, And a control unit for controlling the compressor to discharge foreign substances to the outside through the compressed air of the compressor to be injected into the injection filter, the injection nozzle unit and the suction filter.본 발명은 압축공기를 공급하여 분사노즐, 분사필터 및 흡입필터에 적체되는 이물질을 외부로 배출할 수 있도록하여 적체된 이물질을 지동으로 제거하는 분사노즐 및 필터의 자동 막힘 제거가 가능한 자동 분무시스템에 관한 것으로서, 농약 또는 물 등의 액체가 저장되는 저장통의 내부에 투입되어 이물질을 필터링하여 액체를 흡입하며, 흡입된 액체가 유동되는 흡입관 및 외부의 공기가 주입되는 주입관이 연결되는 흡입필터； 상기 흡입필터의 흡입관과 연결되어 액체를 흡
