The utility model discloses a multifunctional trolley with freely retractable arms. The multifunctional trolley comprises a trolley frame, and ladders for climbing and an operating platform divided into an upper layer and a lower layer are arranged on the trolley frame. Each layer of the operating platform comprises retractable cantilevers and footsteps, wherein the retractable cantilevers fixedly mounted on the trolley frame are capable of expanding outwards freely, and the footsteps are detachably mounted on the retractable cantilevers. With the trolley frame and the ladders, the multifunctional trolley with the freely retractable arms can substitute for a conventional scaffold built easily or a construction rack utilized in construction, the trolley frame is high in stability and safety performance. As the operating platform is arranged on the trolley frame and the retractable cantilevers of the operating platform can retract or extend optionally, operators can be sent to huge core soil demolishing construction areas or construction areas of secondary lining of reinforcement and waterproof plates, and more convenience can be brought to construction.