The invention relates to an anti-theft bicycle. The bicycle can play a part in protection against external disturbance to a certain extent. The bicycle comprises a bicycle body, an anti-theft protection locking device and a built-in GPS positioning system; the anti-theft protection locking device is installed on a front wheel and a rear wheel and comprises a bearing fixing device and an advance hindering device; the bearing fixing device and the advance hindering device are infrared switching devices, the bearing fixing device comprises three iron columns, the three iron columns are clamped in clamping grooves in corresponding bearings in an interlaced mode, the advance hindering device is installed on a front beam of the bicycle body and a rear beam of the bicycle body and arranged in iron-column mode, iron columns of the advance hindering device are clamped in corresponding clamping grooves, and when a switch is not activated, the iron columns are contained inside containing grooves in the bearings, in the front beam and in the rear beam; the built-in GPS positioning system is installed at the position of a steel tube at the inner side of the bicycle body in a hidden mode, a hidden door at the position of the steel tube can be controlled to be opened through a button on a corresponding key, and a battery system of the built-in GPS positioning system is arranged at the backside of the hidden door.