The invention discloses a solar cell having back surface field structures and a manufacturing method of the solar cell. The cell comprises a wafer, a dielectric layer, multiple back surface filed structures, a metal barrier layer and a conductive rubber layer. The improvement of the manufacturing method mainly lies in the fact that before forming the conductive rubber layer, the metal barrier layer is formed on the surface of the dielectric layer, and the material is silver, molybdenum, titanium-tungsten alloy, tungsten, titanium, chromium, molybdenum-tungsten alloy, platinum, gold, nickel or alloy of any combination of the materials mentioned above. By using the metal barrier layer as a surface barrier of the dielectric layer, the material of the conductive rubber layer can be prevented from diffusing in the dielectric layer in the sintering process, and further, the damage of the conductive rubber layer to the dielectric layer can be avoided, so that the dielectric layer has good quality and good effect of reducing the carrier recombination rate, and the cell conversion efficiency can be increased.