The utility model relates to a commentaries on classics equipment technical field, concretely relates to hang supporting crane of commentaries on classics formula ditch cable groove built -up plate are hung in cable groove construction in tunnel ditch. The utility model provides a hang supporting crane of commentaries on classics formula ditch cable groove built -up plate, including setting up the on -vehicle counter weight on the automobile body, crane stand and generator, be equipped with the walking wheel below the automobile body, the crane stand is equipped with walking beam, the electric hoist that the back and forth movement was done to the walking beam direction is connected and follows to the last generator that is equipped with of walking beam, the electric hoist is equipped with the chain sling couple, walking beam is equipped with the spring of being connected through the fixed pin with the crane stand, walking beam's tip is equipped with the bulkhead, the crane stand is equipped with the fixed plate, the fixed plate is connected with the connecting plate, be equipped with the pivot of being connected with the one end of pull rod on the connecting plate, the pull rod is fixed on walking beam. The utility model discloses simple structure and fixed firm can prevent that the crane from walking the swing of capable in -process, and extension electric hoist life is guaranteeing under the safe prerequisite, improves hoist and mount efficiency, shortens construction period.