Hoisting construction method for steel column in construction of protective support for existing overcrossing railway

The invention discloses a hoisting construction method for a steel column in construction of a protective support for an existing overcrossing railway. A single steel wire rope is adopted to bind the steel column in an opposite buckling manner through snap rings, and then the steel column is hoisted by a crane. When the steel wire rope is adopted for binding, two ends of the steel wire rope are arranged from two sides of the top of a flange on the steel column to the body of the steel column, then one end A of the steel wire rope winds the steel column from the front of the steel column to the back, the other end B of the steel wire rope winds the steel column from the back of the steel column to the front, the end A of the steel wire rope is connected with the body of the steel wire rope winding from the back to the front through one snap ring to form a slip knot, and the end B of the steel wire rope is connected with the body of the steel wire rope winding from the front to the back through the other snap r