A method for automatic retraction of a pedal of a bicycle. A first electric actuator is provided on a crank, and the pedal is driven to be retracted by the first electric actuator to complete a first retraction, so that long side of the pedal is changed into a front-rear direction from a left-right direction; a second electric actuator mounted on a bicycle frame drives the crank to idle, and the pedal is gradually straightened in the first retraction process to be parallel with the plane of the bicycle frame to complete a second retraction of the pedal. Using this method, the pedal can be conveniently retracted, and the transverse (left-right) occupying space is minimized, thereby facilitating the automatic storage and saving the storage space.

A method for automatic retraction of a pedal of a bicycle. A first electric actuator is provided on a crank, and the pedal is driven to be retracted by the first electric actuator to complete a first retraction, so that long side of the pedal is changed into a front-rear direction from a left-right direction; a second electric actuator mounted on a bicycle frame drives the crank to idle, and the pedal is gradually straightened in the first retraction process to be parallel with the plane of the bicycle frame to complete a second retraction of the pedal. Using this method, the pedal can be conveniently retracted, and the transverse (left-right) occupying space is minimized, thereby facilitating the automatic storage and saving the storage space.