A draggable type portable bicycle provided with a telescopic handle and a bottom bracket serving as a rotating shaft comprises the telescopic rotating handle, a front fork lever, a front frame, a middle beam, a middle connecting component, a dragging wheel assembly, a rear fork part, a saddle, a front wheel, a rear wheel and a driving mechanism, wherein the telescopic rotating handle is connected with the front fork lever and the front frame and comprises a left handle, a right handle, an upper locking part, a lower locking part and a pull handle; the front frame comprises a rotating component and a front connecting component; the middle beam is formed by connecting a beam tube, a front inner brake shoe, a rear inner brake shoe, a front slotware and a rear slotware; the middle connecting component is formed by connecting a main connecting part, a suspension block and a positioning lock; the rear fork part is formed by connecting the bottom bracket, two bottom bracket connecting parts, a suspension block piece and two rear fork pieces; the saddle is formed by a seat tube, a locking joint part, a connecting rod, a saddle body and a foldable positioning hook; the front wheel is mounted on a front axle, the rear wheel is mounted on the rear fork part, and the driving mechanism comprises a center shaft, two cranks, a crankset, two pedals, a flywheel and a chain and is connected to the bottom bracket and the rear wheel.