The invention discloses a prefabricated column formwork and an application method thereof. The prefabricated column formwork and the application method thereof mainly solve the problems that currently a column formwork needs to be assembled and disassembled on site, and the phenomenon of formwork expansion occurs easily. The prefabricated column formwork comprises a column formwork body, opposite-pull fixing holes, exposed reinforcing steel bars, disassembling and assembling hoisting point components and hoisting bolts, wherein the cross section of the column formwork body is in a right-angle U shape, the column formwork body is of an integrated structure, the opposite-pull fixing holes are formed in the two opposite edges of the column formwork body, correspond to each other and are used for enabling split bolts to be mounted, the exposed reinforcing steel bars are arranged on the column formwork body and are used for being connected with a cast-in-situ column, the disassembling and assembling hoisting point components are arranged on the right-angle U-shape bottom edge of the column formwork body, and the hoisting bolts are arranged on the two opposite edges of the column formwork body and correspond to each other. According to the prefabricated column formwork and the application method thereof, the column formwork body is designed to be of an integrated prefabricated concrete structure, the prefabricate column formwork makes contact with a prefabricated outer wall, and thus construction quality is ensured on the smoothness and mounting accuracy. Meanwhile, the cast-in-situ column is located in the prefabricated column formwork of the concrete structure, and thus the problem that the size of the appearance of the column cannot be controlled to the millimeter level through a traditional formwork and a wooden formwork of the cast-in-situ column, and formwork expansion occurs easily are solved effectively.