Large-span steel truss hoisting construction method

The invention discloses a large-span steel truss hoisting construction method. The method is characterized by comprising the following construction steps of large-span steel truss hoisting installation and large-span steel truss hoisting. The method comprises the following steps that S11, a steel truss is assembled on the projection ground under the design position of a steel corridor; S12, four lifting suspension points are arranged above the steel corridor, and each lifting suspension point is provided with a hydraulic lifter through a lifting support; S21, the hydraulic lifters are loaded to the steel truss to be 9.5-10 cm away from the ground in sequence by 20%, 40%, 60%, 80% and 100%, and stay for 12 hours; S22, the normal state is confirmed, officially lifting is carried out, and the lifting height of each lifting point is measured every 5 cm; and S23, the steel truss is lifted to the position 1 m away from the design position, and the lifting speed is slowed down to be lifted to the design position. Th