Water removal method in perfluoropropylene production process

The invention relates to a water removal method in a perfluoropropylene production process, wherein the water removal method comprises the steps: allowing a perfluoropropylene product system to successively pass through a cooling tower, a condensation dewaterer, a sulfuric acid water removal tower and molecular sieve to remove water. The water removal method can stably and effectively remove water in perfluoropropylene, while the water content of materials is reduced, no new impurities are introduced, moreover, water generated in all steps is injected into an alkali liquor preparation system and is in cyclic utilization, and thus the cost can be saved and environmental pollution is reduced.