Abstract: Bromide was considered to improve the box-model of lower stratospheric ozone heterogeneous photochemical reactions established by Wang and Yang (2007). To obtain further understand of the relationship of stratospheric ozone levels and human activities, the authors investigate the nonlinear response of the lower stratospheric ozone toward the changes in emission intensity of sulfuric acid aerosol, chloride, oxynitride, and bromide. On the basis of the analysis, the authors conclude that when the chloride emission intensity deviates from standard levels, the mutual interaction between aerosol and chloride, oxynitride, and bromide can affect the photochemical system nonlinear response and change the topological structure of parameter space.