The invention discloses a rapid and quantitative detection method of paraffin doped in lard. According to the detection method, through detection on 13C/12C values of a to-be-detected sample and paraffin-undoped lard in the existing database, and a delta 13C value of the to-be-detected sample is calculated and comparatively analyzed to judge whether the to-be-detected sample is doped with the paraffin; on the basis, the paraffin content of the to-be-detected sample can be calculated according to a formula. By virtue of a significant difference between 13C/12C values of carbon stable isotopes of the lard and the paraffin, the purpose of rapidly detecting whether the to-be-detected sample is doped with the paraffin is achieved, and a result is real; in addition, the amount of the doped paraffin can be quantitatively detected, and a quantitative analysis result is reliable; with the detection method provided by the invention, the defects of the conventional detection method of the paraffin doped in the lard can be overcome, the detection efficiency is high, the batch detection can be achieved, the detection analysis cost is low, the detection result is not significantly different from that obtained in the conventional detection method, the result is credible, the pollution to a detection instrument is small and the application prospect is wide.