Multi-point large-span space steel structure overall continuous lifting method capable of freely controlling deflection

The invention discloses an integral continuous lifting method for a multi-point large-span space steel structure with free deflection control. The integral continuous lifting method comprises the following steps: 1) assembling the steel structure on the ground; (2) lifting the derrick mast to be installed in place; (3) a deflection control system is installed in place; (4) the lifting control system is installed in place; (5) the pre-camber is adjusted; (6) pre-lifting; (7) formal lifting; (8) rod piece vacancy filling; and 9) dismounting the equipment. By means of the method, lifting balance control over multiple lifting points can be achieved, the risk of instability caused by structural stress concentration due to lifting is reduced, continuous and rapid lifting can be achieved, the overall lifting time is effectively shortened, the uncertain risk in the construction process is reduced, the safety of the structure is guaranteed, and downwarping deformation automatic control in the lifting process can be ac