Universal moving crane

The utility model discloses a universal moving crane which comprises a frame, a cross beam and two L-shaped crank arms, four power steering wheels are uniformly distributed at the bottom of the frame; each crank arm comprises a lower arm and an upper arm which are connected into a whole, the opening directions of the two L-shaped crank arms face forwards at the same time, and the lower ends of the two lower arms are hinged to the left end and the right end close to the front side of the frame respectively; an oil cylinder is arranged behind each lower arm, a cylinder body of each oil cylinder is hinged to the rear end of the frame on the same side, and a piston rod of each oil cylinder is hinged to the rear surface of the lower arm on the same side; the left end of the cross beam is rotationally connected with the left upper arm, and the right end of the cross beam is rotationally connected with the right upper arm; and at least two winches capable of moving along the length direction of the cross beam are ar