The invention discloses a forging process of a planet carrier, and relates to the processing technology field of the planet carrier. The forging process of the planet carrier aims at solving the technical problems that randomness in processing of a shot blasting machine is large, and unthorough oxide skin treatment of the planet carrier is easily caused. The main point of the technical scheme includes that the basic shot blasting machine is used for polishing, the surface of the planet carrier is washed through high pressure water, oxide skin adhered to the surface of the planet carrier is removed, then secondary sand blasting is performed for fine treatment, and finally high pressure airflow is used for removing chippings; and the treatment effect for the oxide skin is improved.