The invention provides a solar heat absorber with a topside heat absorbing structure, which adopts a structure that an annular heat absorbing surface is arranged at the top of the light receiving area of a cylindrical heat absorber, and the inner ring of the absorbing area is identical with the shape of the heat absorber cylinder and welded with the heat absorber; the outer ring of the absorbing area is circular or the variable shape as the inner ring; the annular heat absorbing surface can be formed by welding heat absorbing tubes on an annular plate (tube-plate structure), or can be formed by the heat absorbing tubes directly welded or finned welded (film-wall structure); and a high-absorbing coating is coated on the lower surface of the annular heat absorbing surface, so as to improve the utilization rate of the solar energy. The topside heat absorbing structure can recycle the sunlight overflown to the upper part of the cylindrical heat absorber, so as to improve the integral converting efficiency of the heat absorber.