The invention discloses a process method for controlling the non-martensite depth of a carburized workpiece. The process method comprises the steps of carburizing, ammonia introducing, primary quenching, high-temperature tempering, secondary quenching and low-temperature tempering for two times. According to the process method for controlling the non-martensite depth of the carburized workpiece, the carbon potential during carburizing is improved, and the proportion of the strong carburizing stage in the total carburizing time is increased, so that the internal oxidation depth in the carburizing atmosphere is decreased; in addition, a certain amount of ammonia is introduced in the final stage of carburizing and heat preservation, N atoms permeate into the surface of the workpiece, the hardenability of a workpiece carburized layer is improved, and hence formation of a non-martensite structure is effectively prevented; and meanwhile, after carburizing is conducted, the high-temperature tempering process is added between the two times of quenching processes, and the subsequent two times of low-temperature tempering processes are conducted, so that the content of surface layer residual austenite is effectively decreased, and the situation that the residual austenite does not meet the technical requirement is avoided.