Abstract: Massworks^TM mass spectrometry combined with NIST11 library was used to the quasi-deterministic analysis of the aroma components of goat oil. Mass spectrometry correction function was established using the mass spectrogram of perfluorotributylamine （PFTBA） as a standard in Massworks^TM mass spectrometry analysis software. Then, the mass-axis correction and peak shape correction were performed on the original scanning chromatogram of the sample collected by TD-GC/MS. The accurate mass of each compound was obtained on a low-resolution mass spectrum, and the molecular formulas of unknown target compounds were obtained by isotope peak shape correction technology (CLIPs Search). The target compounds were determined by comparing the results of Massworks^TM and NIST11 library search. Finally, the results of Massworks^TM mass spectrometry software and NIST11 library search were verified by standards. The results showed that the combination of Massworks^TM and NIST11 libraries enabled fast and quasi-deterministic analysis of the aroma components of goat oil. Through the background subtraction function and parameter optimization of Masswork^TM software, ion fragment information of compound can be obtained and analyzed to obtain the exact molecular weight and molecular formula of the target compound. In this experiment, qualitative analysis was conducted for the aroma components of different parts of the sheep body. Finally, 42 aroma components of sheep oil were identified, including 15 kinds of hydrocarbon, 14 kinds of aldehydes, 4 kinds of alcohols, 3 kinds of ketones, 2 kinds of lipids, 2 kinds of ethers, and 2 kinds of other substances. Their relative contents were compared using the area normalization method. This method not only solved the qualitative uncertainty of the natural product aroma components and the uniqueness of the NIST11 spectral library, but also provided a reference for the consumption of sheep oil and the separation of aroma components. On the other hand, the qualitative analysis method can provide new ideas and references for the analysis of aroma components of natural products in the future. The quasi-determinacy of the aroma components of sheep oil in animal oil can be used as an effective qualitative method to achieve simple and accurate qualitative analysis.