NOVELTY - Method can be used for making solar power assemblies provided with axial-symmetrical concentrators. According to first version, tube with diameter D is made on base of n cylindrical mirror reflectors, having receiver with linear size of D. Then tube is cut at angle of beta=pi/2(n-2/n) to axis of tube to blanks in such a way, that trapezoid is made to have angle between side faces of alpha=2pi/n, and relation of lengths of lower base to top base equals to k=2-20. N trapezoid-shaped sections of tubes are put in form of toroid-shaped blank and are connected together by means of welding, soldering, gluing or by means of screws and rivets. Toroid-shaped blank is placed into cast made of two separated chambers and cast if filled with fibrous concrete, with mixture of concrete and polymer or with polymer only. Chambers are separated after compound is hardened. Toroid-shaped blank is put off and is cut to two blanks of semi-toroid concentrators. Mirror coating is applied onto concentrators by depositing or by gluing of metallized film, of sheets of polished aluminum or glass mirror facets. Receiver with linear size of D is mounted axis-symmetrically onto made concentrator in middle plane. According to second version, n blanks of n-sector cylindrical concentrator (n-3-60) are cut of flat thin metal sheet or of plastic having mirror coating. Two frame with similar sizes are made in form of two bigger and smaller polygons, having number of sides as n and diameter of described circle around bigger polygon (1,75-2,25) of linear size of receiver D to have relation of diameters of circles, described around bigger and smaller polygon, being equal to 2-25. Any of n blanks, having mirror coating, is bent in form of sector semi-cylinder, which forms a trapezoid in plan. Bigger base of trapezoid is connected to one side of bigger polygon, and smaller base is connected to parallel side of smaller polygon by welding, gluing or by means of rivets and bolts or by any other way. Receiver with linear size D is mounted axial-symmetrical in central part pf plane of bigger polygon. According to third version, two frames in form of two bigger and smaller polygons of different sizes are mounted in axial symmetry in middle plane onto which plane the radiation comes. Number of sides of polygons equals to n, where n=3-60. Sides of polygons are parallel to each other. Diameter of circle described around bigger polygon, being equal to (1,75-2,25) of linear size D of receiver and relations of diameters of circles, described around bigger and smaller polygons, equals to 2-25. Vertexes of polygons being closest to each other are connected by curvilinear hard members, which form surface of sector semi-cylinder with diameter being equal to distance between parallel sides of bigger and smaller polygons with different sizes of sides. Mirror coating in form of metallized plastic, polished metal or glass mirror facets is put on form of semi-cylinder onto curvilinear hard members. The coating is attached to curvilinear members by any known method, namely, by means of glue, weld, soldering or by means of rivets and bots with nuts. Receiver with linear side D is mounted in axial symmetry in plane of frame of bigger polygon. According to fourth version, tube with diameter D is made to have mirror coating onto its internal side. Tube is cut to two symmetrical semi-cylindrical blanks along axis of tube. Ready blanks are cut in perpendicular to plane of inlet opening of semi-cylinder at angle beta=pi/2(n-2/n) to sector blanks in such a way to get trapezoid with angle between side faces alpha=2pi/n. Then n sector semi-cylindrical blanks are put in form of n-sector semi-toroidal cylindrical concentrator and are connected together along side faces by trapezoid. And then receiver with linear size D is put in axial symmetry onto semi-toroidal sector cylindrical concentrator.    USE - Solar-energy technology.    ADVANTAGE - Reduced costs; ability of making solar power assembly of any size; usage of simple equipment and tools.6 cl, 4 dwg