Spiral staircase of steel-concrete structure and manufacturing method of spiral staircase

The invention relates to the field of constructional engineering, in particular to a spiral stair of a steel-concrete structure and a manufacturing method of the spiral stair. Comprising a ladder column, the ladder column is of a cylindrical structure, and a plurality of step plates are arranged in the circumferential direction of the ladder column and are spirally distributed in the circumferential direction of the ladder column; the step plates comprise horizontally-arranged flat plates, the bottoms of the flat plates are fixedly connected with reinforcing structures, the sides, close to the ladder columns, of the flat plates are fixedly connected with connecting plates, the connecting plates are vertically arranged, and the shapes of the connecting plates are matched with the outer contours of the ladder columns. The method can meet the requirements of structural strength and the like, is convenient to construct, is durable and attractive, and has very high practical value. 本发明涉及建筑工程领域，尤其涉及一种钢混结构的螺旋楼梯及其制作方