In the circumstance that the information keeps developing rapidly, the paper designed a kind of high-efficient city logistics flow path by Petri Net and offered a city logistics model based on cloud platform, assisted it with the distributed cloud storage. Meanwhile, the paper used NoSQL to memorize the data involved in the logistics system, enhanced the efficient of the system and saved the data space at the same time, and eventually compared it detailedly with the conventional SQL database, analyze its advantage with space and time complexity.