The invention aims at providing a high-capacity viscose staple fiber post-treatment production line in order to reach the annual yield of 100 thousand tons. The production line comprises a refining system and a drying system. A refiner in the refining system comprises a refining section and an oiling section. The high-capacity viscose staple fiber post-treatment production line is characterized in that the breadth of the refiner of the refining system is 4000mm, the refining section is divided into 13-18 process areas, the oiling section is divided into 2 process areas and the length of a single process area is 2500mm. The viscose staple fiber post-treatment production line comprises the refining system and the drying system, and has the advantages that the production capacity is strong, the operation stability is high, the automation level is high and the product quality is guaranteed.