Disclosed is an agricultural air injection apparatus including: a compressor for compressing air an air tank which has a pressure gauge and a safety valve for presenting overpressure and stores compressed air of high pressure in a set pressure condition a decompression valve for decompressing air pressure discharged from the air tank a sprayer for spraying water in a particle state in order to make vapor contained in the supplied air a distributor which uniformly distributes the decompressed air to a plurality of flow paths and has a control valve to open and close the flow paths an air supply pipe which is buried in the soil where crops to be cultivated will be planted and has pores for supplying air passing through the distributor and a controller which is connected to the compressor the pressure gauge of the tank and the control valve of the distributor to control supply of the compressed air.
