Hoisting column assembling method and hoisting column

The method comprises the following steps that side boards are installed on the two sides of an inner longitudinal wall, installation grooves are defined by the side boards and the inner longitudinal wall, longitudinal and transverse wall boards are assembled in the installation grooves to form a frame, and then an outer longitudinal wall is welded to the frame to form a column body; first hangers are installed on the two side boards correspondingly, second hangers are installed on the outer longitudinal wall face, the first hangers, the second hangers and third hangers located on the inner longitudinal wall are hoisted through a hoisting device, the column body is hoisted to be turned over, and the outer longitudinal wall serves as a base face; hoisting the column head to be butted with the column body, and welding the inner longitudinal wall and the column head; hoisting the first hanger, the second hanger and the third hanger by using a hoisting device so as to hoist the column body and the column head to t