Large transformer coil demolding device and method

The invention relates to a large transformer coil demolding device and method, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a lifting shaft (1) is arranged at the top end of a main cross beam (2); the main cross beam and a rotary cross beam (4) are arranged in a staggered mode to form a cross-shaped composite beam, and a rotary shaft (3) is arranged in the center of the cross-shaped composite beam; a cross beam rotation adjusting device (5) is arranged on the cross-shaped composite beam; two adjustable movable stand columns are arranged onthe main cross beam of the cross-shaped composite beam in a sliding mode through idler wheels, and the other two adjustable movable stand columns are arranged on a rotating cross beam of the cross-shaped composite beam in a sliding mode through idler wheels; an adjustable movable stand column (6) is connected with the cross-shaped composite beam through a stand column synchronous adjusting device(7); and a dovetail suppo