The use of precast floor can reduce the workload of supporting formwork on construction site, save labor and turnover materials, and has good economy. It is an important measure for precast concrete construction to reduce cost, speed up construction period and ensure quality. Among them, prestressed floor can effectively play the role of high-strength materials, reduce cross-section and save steel, which is an important measure of energy conservation and carbon reduction. The prefabricated floor slab has high production efficiency and fast installation speed, which can create significant economic benefits.