In recent years, with the development in environmental protection, the starch film have attracted much attention owing to its wide source, low price and complete biodegradability. The research significance and the purpose of starch films were introduced firstly. The preparation technology of starch films and the research progress of nano-reinforced starch films were reviewed, including the production principles of starch films, processing advantages and the effects of different nano-reinforced materials on starch films. Finally, the problems existing in the research of starch films were analyzed, and the development of starch films was prospected. Future research could focus on the thermoplastic film-forming technique of starch and the physicochemical modification of nano-fillers. Meanwhile, the synergistic enhancement of nanomaterials would be an important development direction in starch films.