Tunnel salvage crane

The utility model discloses a tunnel salvage crane at least comprising a mechanical arm, a front support, a rear support, gantries, at least two hoisting trolleys, a dragging mechanism, a power system and at least two travelling trolleys, wherein the mechanical arm is supported by the front support and the rear support; the rear support is arranged at the rear end of the mechanical arm; the front support is movably supported in the middle of the mechanical arm; the lower ends of the front support and the rear support are respectively provided with one of the gantries; the hoisting trolleys are arranged on the mechanical arm in a way of moving forward and backward; the dragging mechanism is arranged at the rear part of the mechanical arm so as to drag and move the hoisting trolleys; and the travelling trolleys are detachably arranged at the lower ends of the gantries. The tunnel salvage crane is high in hoisting capacity, low in operation space, high in transportation speed, short in assembly time, high in wor