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rate increased with time. The best preparation process of tobacco extract microcapsules was 25% mass fraction of emulsifier, 2.05% mass fraction of gelatin, 3% mass fraction of gum arabic, 1.34 wall core ratio, 36 min of complex coacervation time. The embedding rate was 58.4% which is approximately the theoretical embedding rate (58.9%). The microcapsules prepared by this method have a smooth surface, good combining form and particle size distribution, and a median diameter of 8.6 μm. Infrared characteristic peaks of the extracts were preserved at 877.55 cm -1 and 2922.13 cm -1 . Microencapsulation can improve the thermal stability of the tobacco extract. Indoor toxicity tests showed that LC 50 of extract microcapsules was 20.2 mg•mL -1 , equivalent to the toxicity level of the tobacco extract itself, indicating that microencapsulation did not reduce extract insecticidal effects. This research may provide a reference for the optimization of the tobacco extract microcapsule preparation process.