Method for rapidly detecting source of oil stain on cigarette outer wrapping paper

The invention relates to a method for rapidly detecting the source of oil stains on outer packaging paper of cigarettes, which comprises the following steps: S1, collecting engine oil at different parts of a range hood, and extracting respective characteristic fluorescence peaks by collecting two-dimensional and three-dimensional fluorescence spectra of the engine oil; s2, changing excitation wavelength and slit width test conditions, obtaining two-dimensional and three-dimensional fluorescence spectrums of the engine oil at different parts under the excitation wavelength and slit width test conditions, and extracting respective characteristic fluorescence peaks of the two-dimensional and three-dimensional fluorescence spectrums; s3, establishing a fingerprint database of two-dimensional and three-dimensional fluorescence characteristic peaks of engine oil at different parts; s4, collecting and extracting yellow spot oily pollutants on the cigarette paper, and measuring a spectrogram of a fluorescence charact