The invention relates to a method for producing rotary air conditioner compressor blades and belongs to the technical field of compressor materials. The method for producing the rotary air conditioner compressor blades is provided to solve the problem of poor accuracy of prior blades after use. The method comprises the steps of selecting steel materials for rough machining according to the sizes of the rotary air conditioner compressor blades to obtain corresponding blade blank; performing vacuum hardening treatment on the obtained blank, and performing primary annealing after the vacuum hardening treatment; putting the blade blank into a subzero treatment device for subzero treatment after the primary annealing; and performing annealing at least once after the subzero treatment, and then performing finish machining to obtain the finished rotary air conditioner compressor blades. According to the method, the effect on accuracy due to changes of the blade size caused by the fact that excessive retained austenite is converted into martensite can be effectively prevented, and the accuracy effect, service lives and efficiency of the blades can be guaranteed.