The menthyl nylon acid was synthesized and the synthesis process was optimized through single-factor experiment. The main components of menthyl nylon acid were analyzed and characterized by IR, 1H-NMR and HR-MS spectra. The thermal mass loss, pyrolysis temperature and pyrolysis products of menthyl nylon acid were investigated by thermogravimetry-derivative thermogravimetry anaylsis(TG-DTG) and pyrolysis gas chromatography/mass spectrometry (Py-GC/MS), and the sensory evaluations were carried out. The results showed that: 1) the yield of menthyl nylon acid reached 89.3% under the optimum condition. 2) the weight loss rate of menthyl nylon acid was the fastest at 301.5 ℃, the weight loss reached 100% at 341.6 ℃; the main pyrolysis products of menthyl nylon acid was L-menthol in 300~450 ℃, which reduced with the increase of pyrolysis temperature. 3) the menthyl nylon acid had obvious effects on mellow and sensory coziness of the cigarettes, and it was better than the single menthyl non-volatile organic acid in improving the sensory quality of cigarettes.