The invention provides a novel electric folding bicycle. The novel folding bicycle comprises a five-through-body machine shell, a power device, a frame system, a front wheel device, a saddle device and a rear wheel device, wherein the five-through-body machine shell comprises a front triangular shell, a rear triangular shell and a shell; the front triangular shell comprises a front triangular shell hollow ring, a front triangular shell arched connecting plate, a medium tube fixing hole, a fixing base and a spring pin; the rear triangular shell comprises a rear triangular shell hollow ring, a rear triangular shell arched connecting plate and a spring pin; the shell comprises a shell hollow ring and an inner shell hollow ring; the frame system comprises a head tube, an upper tube, a lower tube, a medium tube, an upper supporting fork, a lower supporting fork, a reinforcing rod, a supporting rod, a first connector, a second connector, a third connector and a connecting guide part. The electric folding bicycle can be folded longitudinally and can be moved upstairs easily and attached to a wall at home after being folded without affecting daily life of people, and occupied space is further reduced compared with transverse folding space occupied by the folding bicycle with longitudinal folding is further reduced compared with space occupied by the folding bicycle with transverse folding.