The invention discloses a mutual feedback jet flow spray nozzle and a spraying method. The mutual feedback jet flow spray nozzle comprises a rotating drive plate, a jet flow element, a current stabilizer, a spray body, a hollow shaft and a shaft sleeve. The jet flow element is located at the tail end of the spray body. The rotating drive plate is connected to a wall face of a jet flow outlet. When the mutual feedback jet flow spray nozzle conducts spraying, water flow enters the spray body from the hollow shaft, arrives at the position of a spray nozzle body through the spray body, forms jet flow in a jet flow space and generates a jet flow wall attaching effect, the wall attaching water flow deflects intermittently under the water pressure effect inside a mutual feedback passageway, and therefore the water flow flows between the two side walls of the jet flow space in a switched manner according to a certain frequency to impact on the rotating drive plate intermittently, the spray nozzle is driven to rotate around the shaft sleeve together with the hollow shaft, and the spray nozzle conducts spraying along the circumference. The mutual feedback jet spray nozzle and the spraying method have the beneficial effects of being simple in structure, high in reliability, low in manufacturing cost and the like and meet requirements of various sprinkling irrigation systems for field crops, forage grass, forest fruits, flowers and the like.