The invention discloses a stainless steel rice steaming cart surface passivation treatment fluid and relates to the technical field of stainless steel. The stainless steel rice steaming cart surface passivation treatment fluid is prepared from the following ingredients: molybdate, phosphoric acid, sodium sulfate, nitric acid, dimethylsilane, zinc sulfate, ribonucleoside triphosphote modified chitosan, glycerin, ammonium chloride, rare earth chloride and deionized water. The passivation fluid has reasonable composition. After a passivation film is formed on the surface of a stainless steel ricesteaming cart, the passivation film can be tightly combined with the stainless steel rice steaming cart body. The formed passivation film has strong abrasion resistance and lubricity, and then service life is prolonged. Through synergism of molybdate, ribonucleoside triphosphote modified chitosan and rare earth chloride, the passivation fluid has strong film forming ability and stability and hasfast film forming speed, and the formed passivation film has excellent corrosion resistance.