Abstract: Polypropylene film capacitors are widely used in power transmission and transformation engineering, civil home appliances and new energy equipment. With the development of ultra-high voltage smart grid and other emerging industries, the demands for high-performance film capacitors are increasing. However, at present, the ultra-clean polypropylene raw materials involved in polypropylene film capacitors are completely dependent on import from abroad. Although domestic substitute polypropylene resin raw materials have been developed in China, the processing stability and comprehensive performance are poor when making capacitor films. Once the raw material is out of supply in foreign countries, the polypropylene film capacitor will become a jammed problem. It is urgent to develop the capacitor film production technology suitable for domestic materials and form an independent supporting process. In this paper, along with the process of film-forming technology of domestic capacitive films, the problems found and the progress achieved in the process of experimental verification of the in-depth cooperation between manufacturers and scientific research institutes in related fields are discussed. Firstly, the development status of polypropylene capacitor film is summarized, especially the development progress of domestic capacitor film and its comparison with imported capacitor film. At present, by optimizing the tensile process, chain structure regulation and crystal structure regulation, the domestic crude film reaches or exceeds the level of similar imports in terms of porosity, roughness and dielectric strength, while the metallized film shows better performance in terms of loss and breakdown field strength. The influence of the stretching temperature on the oriented crystal structure of the capacitor film and the relationship between the structural evolution of the film and the electrical properties under different stretching methods (synchronous and asynchronous) are also discussed. These findings provide an important reference for the industrial production and performance optimization of domestic PP capacitive membranes.