The invention discloses a folding skateboard bag which is a complementing type transportation tool, wherein the folding skateboard bag comprises a folding pedal, a case, rolling wheels, a guide mechanism, a brake system, a motor, a battery and a motor control system. The folding skateboard bag integrates portability, passing ability and economy, the case is designed into a commuting tool which is low in weight, high in strength, and capable of being folded easily, being carried indoors and into other transportation tools, the seamless combination of individual slow traffic, public transport and a destination is achieved, a user can go out flexibly, and the problem of a last mile is solved.