Porous SiO2 anti-reflective coating were obtained through a sol-gel process using tetraethylorthosilicate and/or commercial nano-SiO2 sol as precursors under different catalytic conditions, the optical properties and porosities of the coated glass samples were measured and calculated. The influences of the porous structure of the coatings on its fastnesses and weatherabilities were discussed. Based on the results, the stepped base/acid catalyzed process and acrylic resin was used to further improve the structure of the coatings during the synthesis process. The final coated solar glass products, processed by industrial roller-coating equipment, can achieve a transmittance of 93.7% and meets the current product standards.