E-Bike (electric bicycle) is a new type of transportation that combines traditional bicycles and electric vehicles. The power provided by the motor makes riding easier and labor-saving, while maintaining the environmental protection and health characteristics of the bicycle. In European countries, cycling culture has a long history and public transportation is expensive. E-Bike are favored for their advantages of health, speed, labor saving and low travel cost. However, in European countries, the phenomenon of bicycle theft is serious and the space of early elevators, stairs and corridors in infrastructure construction is very narrow, which makes it very inconvenient to carry and store E-Bike. However, the folding process of folding E-Bike on the market is cumbersome and laborious, so my research direction is fast folding E-Bike.