Method for installing curtain wall at bottom of large-span steel corridor

The invention discloses a method for installing a curtain wall at the bottom of a large-span steel corridor. The method comprises the following steps that coordinates and heights of curtain wall connecting rods are calculated; surveying and setting out are carried out; a curtain wall connecting rod is welded to the bottom of the steel corridor; the whole curtain wall is split into a plurality of curtain wall units; a fixed lifting point is arranged on the steel corridor, the position of a follow-up lifting point on the steel corridor is adjusted, and a steel wire rope winds around the fixed lifting point and the follow-up lifting point and then lifts the curtain wall unit; the hoisting system turns over the curtain wall units; the hoisting system lifts the curtain wall unit; and the curtain wall units are welded with the curtain wall connecting rods. The construction method has the beneficial effects that the curtain wall connecting rods and the curtain wall units are mounted or spliced in advance before hois