The invention discloses an organic and inorganic compound passivation solution and a passivation method. The passivation solution comprises, by mass, 20.0-35.0% of citric acid, 5.0-15.0% of phytic acid, 0.5-2.0% of cerous nitrate, 2.0-3.0% of sodium molybdate, 2.0-3.0% of triethanolamine, 1.0-5.0% of nanometer silicon sol dispersion liquid, 1.0-5.0% of water-borne acrylate, 1.0-5.0% of gama-(2,3-epoxy propoxy) propyl trimethoxy silane, 2.0-10.0% of sodium dodecyl sulfate and the balance water. The passivation method comprises the steps of stainless steel product pretreatment, surface acid passivation, cleaning, drying and the like. The compound passivation solution does not contain nitric acid or chromate, pollution to environment is greatly decreased, and meanwhile, the passivation effectof the traditional nitric acid and chromate technique can be achieved.