The utility model discloses a heliostat, comprising a reflecting surface formed by splicing a plurality of reflector units, a supporting device for fixing reflectors and a transmission mechanism, wherein the supporting device comprises a column, a supporting net rack and truss girders; the truss girders are connected with the column by the transmission mechanism; the supporting net rack is mounted at one end of the truss girders and has a square pyramid net rack structure; and the reflector units are mounted on net rack nodes of the square pyramid structure of the supporting net rack. The heliostat disclosed by the utility model is convenient to control, is simple and easy to manufacture, has high structural rigidity, and can ensure the surface flatness of the reflecting condensing curved surface.