The invention belongs to the technical field of electroplating processing, and particularly relates to an environment friendly chromate-free passivation solution based on silicate, and a passivation technology thereof. The environment friendly chromate-free passivation solution based on the silicate provided by the invention comprises water, low mass molecule alcohol, sodium silicate, potassium silicate, sodium metasilicate, silane hydrolysate, diphenol propane, diethylene glycol monobutyl ether, sorbitol, phytic acid, glacial acetic acid, tannin, boric acid, sodium metasulfite, sodium nitrate, sodium hydrogen sulfite and other components, has excellent stability and can be stably stored for more than three months; and in the aspect of a passivation performance, a passivated coating has excellent corrosion resistance, blackening resistance and high temperature baking resistance. A passivation technology of the environment friendly chromate-free passivation solution based on the silicate provided by the invention comprises the steps of steeping, airing, ageing and the like. The environment friendly chromate-free passivation solution based on the silicate and the passivation technology thereof are simple and convenient to operate, economical in cost and stable and reliable in quality, and have higher popularization and application values.