Abstract: To reduce aroma loss during storage, nine kinds of key aroma compounds ( ethyl acetate, ethyl lactate, ethanol, diethyl succinate, benzyl alcohol, amyl alcohol, acetic acid, furfural, 2-hydroxy-4-methyl pentanoate) of xiangzaolu was selected as core material, and soy protein isolate and maltodextrin were taken as wall material.Univariate and response surface experiments were applied to analyze the best embedding condition through the isolated soy protein content, homogenization time, the amount of emulsifier and the core content.The optimal conditions were as follows: isolated soy protein content 4.11%, emulsifier content 2.22%, core content 19.33%, homogeneous time 7.39 min.The rate of microcapsules was 70.12%.The verified value was closed to the predicted maximum value ( 69.59%) , which certified that the fitting of regression model was good. Hence, the optimized condition of Xiangzaolu simulate substance by response surface is feasible.