The invention discloses a cam processing process. The cam processing process comprises the following steps that (1) a roll groove of a roll is designed; (2) a round blank is selected as an original blank; (3) the blank is put into a heating furnace to be heated to the blooming temperature; (4) the heated blank is put into a longitudinal mill to be milled, the shape of the roll groove is not changed, only a roll gap of the roll is changed, longitudinal rolling is finished through multiple times of rolling until the roll groove is filled with burdening, and the total rolling time is greater than or equal to one; and (5) the rolled blank is cooled to the room temperature. The performance and utilization rate of materials are improved; the precision is improved, the period is shortened, and the inhomogeneity of the structure is avoided; the design and processing processes are simplified, and the cost is reduced.