The invention relates to a high-efficiency and environmentally-friendly automatic spraying device for mold oil. The spraying device comprises an air supply station and an air supply pipeline connected with the air supply station; the spraying device also comprises a receiving tank, a self-priming pump and a receiver, wherein the receiver and the self-priming pump are respectively arranged above the receiving tank; the filtered mold oil flows to the receiving tank through the receiver discharge hole of the receiver; a return pipe is connected between the receiving tank and the self-priming pump; the spraying device also comprises a mixing drum; the mixing drum is provided with a mixing motor; the mixing drum and the self-priming pump are connected through a pipe for the mold oil to return to the mixing drum; a three-way device is arranged among the receiving tank, the air supply pipeline and the mold oil feed pipe. The spraying device is skillful in integral structural design; an automatic spraying and mold oil recovery device is additionally arranged, so that manual operation is not needed during the whole process, the work efficiency is high, disassembly and maintenance are convenient, and the cost is lower.