The invention discloses a method for manufacturing a double-sided PERC high-efficiency crystalline silicon solar cell. The method comprises the following steps of (1) texturing, (2) diffusion including crystalline silicon diffusion, (3) laser doping including the laser doping of a diffused crystalline silicon, (4) etching including the removal of diffused borophosphosilicate glass, (5) back passivation including the production of a SiO2-Al2O3-SiNx:H laminated passivation film with a thickness of 80-100 nm, (6) front side film coating including the generation of a SiO2-SiNx anti-reflection filmwith thickness of 80-90 nm by using the PECVD technology, (7) Backside laser doping and trenching including the formation of a corresponding P++ layer, wherein the line width of each of 120 laser doped region sub-gate lines is 40-45 micrometers, and composite 1.6 mm main grids are set, and (8) backside printing including the formation of a back aluminum grid pattern, the collection of current andsintering to form the double-sided PERC high-efficiency crystalline silicon solar energy battery.