Traveling crane with traveling trolley and hoisting winch

The invention relates to a traveling crane with a traveling trolley and a hoisting winch. The traveling crane comprises two symmetrically-arranged supporting legs; a main beam is arranged on the tops of the supporting legs; a trolley frame is arranged on the upper portion of the main beam; the lower portion of the middle of the trolley frame is connected with a hook device; wheels are symmetrically arranged on the two sides of the bottom of the trolley frame; guide rails are symmetrically arranged on the two sides of the top of the main beam; and supporting devices are symmetrically arranged on the two sides of the trolley frame. Each supporting device comprises a motor A; an output shaft of each motor A is connected with an input shaft of a gearbox A; an output shaft of each gearbox A is connected with a gear which is engaged with a rack; a supporting plate is arranged at the bottom of each rack; a winch device is arranged in the middle of the upper end of the trolley frame; the winch device comprises a motor B which is connected with a coiling block. The traveling crane with the traveling trolley and the hoisting winch has the advantages of being simple in structure, reliable in operation and good in economical efficiency.