The invention discloses a high-concentration solar battery chip comprising an epitaxial layer structure, an upper patterned electrode formed on the epitaxial layer structure through special design, and a back electrode formed on the lower surface of the epitaxial layer structure. The upper patterned electrode comprises a main grid and a secondary grid, wherein the main grid is formed by connecting a series of isosceles trapezoid structures, and the upper edges of the trapezoids are on a same line and are directed to the inner part of the battery chip; a zone between the upper edges and the lower edges of the trapezoids is a lead welding zone; and the secondary grid is connected with both waists of the trapezoidal main grid. The high-concentration solar battery chip has the following advantages: the upper patterned electrode is designed specifically so that the large density current of the solar battery chip, caused by high-concentration, is fully expanded when flowing through the maingrid to avoid crowded current; and simultaneously, an effective lighting area of the light condensation solar battery chip is enlarged, and the photo-generated current is increased.