NOVELTY - A crystalline silicon solar cell gridline is prepared by carrying out biomimetic membrane liquid phase deposition of nickel to obtain nickel gridline solution containing 10-25 g/L nickel(II) sulfate hexahydrate, 10-25 g/L sodium phosphate dihydrate, 5-20 g/L sodium citrate, 5-20 g/L sodium propionate, 0.5-2.5 mg/L brightening agent, and 0.5-2.5 mg/L stabilizing agent, and performing liquid phase deposition of copper for copper gridline solution containing 25-80 g/L copper(II) sulfate pentahydrate, 160-200 g/L sulfuric acid, 30-60 ppm chlorine anion, and 1-5 ppm brightening agent.    USE - Preparation of crystalline silicon solar cell gridline (claimed).    ADVANTAGE - The process is easy and low cost, has precise controllability, enhances light absorption and charge collection capability of battery, and consumes less energy, and the gridline has good adhesion, high deposition rate, and good quality.    DETAILED DESCRIPTION - A crystalline silicon solar cell gridline is prepared by carrying out biomimetic membrane liquid phase deposition of nickel to obtain nickel gridline solution containing 10-25 g/L nickel(II) sulfate hexahydrate (NiSO4.6H20), 10-25 g/L sodium phosphate dihydrate (NaH2PO2.2H20), 5-20 g/L sodium citrate, 5-20 g/L sodium propionate, 0.5-2.5 mg/L brightening agent, and 0.5-2.5 mg/L stabilizing agent, performing liquid phase deposition of copper for copper gridline solution containing 25-80 g/L copper(II) sulfate pentahydrate (CuSO4.5H20), 160-200 g/L sulfuric acid (H2SO4), 30-60 ppm chlorine anion (Cl-), 1-5 ppm brightening agent, and 2-6 ppm leveling agent, coating PN junction solar cell to form photoresist film, formulating masked structure for photoresist film, developing photolithographic window by UV light exposure, immersing photolithographic cell in nickel solution at 20-75 degrees C, illuminating for 0.5-6 hours with light intensity of 0.5-3 suns, generating nickel gridline on solar cell, immersing in copper solution at 25-80 degrees C, and adding power to obtain copper gridline.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of preparation of crystalline silicon solar cell gridline. (Drawing includes non-English language text).