Prefabricated formwork capable of preventing slurry leakage

The utility model provides a prefabricated formwork capable of preventing slurry leakage. The prefabricated formwork capable of preventing slurry leakage comprises a formwork body, a rubber gasket and a connecting assembly. Wherein the template main body comprises a plate body and a turnup located at the outer edge of the plate body. The rubber gasket is annularly arranged on the outer side of the turned-over edge in a sleeving mode and provided with an inner side wall abutting against the turned-over edge and an outer side wall away from the turned-over edge, a first arc-shaped groove used for increasing the deformation quantity is formed around the inner side wall, and a second arc-shaped groove used for increasing the deformation quantity is formed around the outer side wall. The rubber gasket is further provided with a third arc-shaped groove used for increasing the deformation quantity. The connecting assembly is used for fixing the rubber gasket. According to the prefabricated formwork capable of preven