Multi-point pushing system of large-span steel truss girders and pushing process thereof

The invention discloses a multi-point pushing mechanism of large-span steel truss girders and a pushing process thereof. The multi-point pushing mechanism comprises six sets of pushing systems and auxiliary dragging mechanisms, wherein the six sets of pushing systems are respectively arranged at the bottoms of two steel truss girders, and the auxiliary dragging mechanisms are arranged at the bottoms of lower chords of the steel truss girders; and the main pushing system is provided with two main longitudinal slide-ways which are supported on temporary support slide-way beams. By using the multi-point pushing mechanism provided by the invention, the steel truss girders comprising at least two main trusses are stressed definitely in pushing construction, thereby the pushing quality of the steel truss girders is ensured.