The invention relates to an oil stain cleaning agent, which comprises propylene glycol n-butyl ether, sodium citrate, ethyl acetate, penetrating agent, sodium sulfate and chelating agent, wherein, the weight percentage of propylene glycol n-butyl ether is 15-30%, sodium citrate The weight percentage of sodium sulfate is 15-25%, the weight percentage of ethyl acetate is 15-25%, the weight percentage of penetrating agent is 10-15%, the weight percentage of sodium sulfate is 8-12%, and the weight percentage of chelating agent is 15%. ~35%. The oil stain cleaning agent in the present invention The oil stain cleaning agent in the present invention has reasonable formula, low cost, good cleaning effect, high cleaning efficiency, obvious sterilization and decontamination effect, no pollution to raw materials, and no corrosive effect on cleaning objects, no residue, Strong compatibility.