In recent years, the global environmental protection for the new energy industry has increased investment, especially the wind power industry has been developed by leaps and bounds. Wind power equipment has a large weight, large size characteristics, requiring heavy load cranes (currently the largest available to 100 tons), lifting and running a smooth and reliable, and according to the actual lifting needs of the scene to provide stand-alone, multi-machine synchronous lift Hanging, flip the program, as well as with the lifting of the use of a variety of special spreader.