The invention discloses a multifunctional hydraulic crane which comprises a mounting rack, two frames, two main supporting wheels, two auxiliary supporting wheels, a hoisting executing mechanism, a cargo boom, an accessory mounted at the end of the cargo boom, a power box and a control unit. The two main supporting wheels are rotationally mounted on two main supporting wheel mounting racks on the mounting rack, and the two auxiliary supporting wheels are rotationally mounted on a foldable auxiliary supporting wheel mounting rod in the middles of the frames. The bottom end of the hosting executing mechanism is hinged to the front end of the mounting rack, the top end of the hosting executing mechanism is rotationally connected to the cargo boom, and the bottom end of the cargo boom is rotationally connected with the frames. The power box is connected with the hoisting executing mechanism and an executing mechanism of the accessory through the control unit so as to provide a power source. The multifunctional hydraulic crane can be folded to carry, and is convenient to mount and demount, simple in structure, convenient to use and operate, light, diversified in function and suitable for multiple complex work environments such as indoor environments and field environments.