The invention provides a device for manufacturing a structural component with a circular arc-shaped edge. The device provided by the invention comprises a discoid body, an operating handle (100), a stop block (400) and a roller (200), wherein a ring groove is formed in the edge of the discoid body; the roller (200) is arranged on the operating handle (100), and the roller (200) and the ring groove form a pressing hole (b); the stop block (400) is fixed on the discoid body, and the stop block (400) and the ring groove form a positioning hole (a); and the operating handle (100) is rotationally connected with the discoid body, and the roller (200) can roll along the ring groove as the operating handle (100) rotates. The device provided by the invention can solve the problems of high manufacturing cost, large energy consumption and low production efficiency, which exist in the manufacturing process of the structural component with the circular arc-shaped edge at present.