The application discloses a bicycle chain rust inhibitor. The bicycle chain rust inhibitor is prepared from the following materials in parts by weight: 10 to 80 parts of polyoxypropylene fatty alcoholether, 100 to 150 parts of potassium nitrite solution with a concentration of 30%, 20 to 80 parts of acrylic resin, 30 to 90 parts of epoxy resin, 50 to 120 parts of sodium sulfonate, 50 to 80 partsof glycerin methyl ether, 80 to 120 parts of polyisobutylene, 20 to 40 parts of silica, 10 to 50 parts of leveling agents, and 20 to 50 parts of defoaming agents. Therefore, the rust inhibitor has a long rust prevention time, and can prevent the surface of a material from being rusted again after use; the bicycle chain rust inhibitor is convenient for disposal of an abandoned rust inhibitor, meetsenvironmental protection requirements, has no pollution to equipment, has no corrosion, effectively reduces production cost, and is safe and reliable to use.