To explore the possible impacts of heterogeneous chemical processes on atmospheric trace components,a coupled box model including gas-phase chemical processes，aerosols thermodynamic equilibrium processes，and heterogeneous chemical processes on the surface of dust,BC and seasalt iS set up to simulate the effects of heterogeneous chemistry on the aerosol surface，and analyse the primary factors affecting heterogeneous chemical processes．Results indicate that heterogeneous chemical processes on the aerosol surface in the atmosphere will affect the concentrations of trace gases like H2O2，HO2，O3，NO2，NO3，HNO3 and SO2，and aerosols like SO42-，NO3-and NH4+．Sensitivity tests suggest that the magnitude of the impacts of heterogeneous chemical processes strongly depend on the aerosol concentration and the surface uptake coefficients used in the box model．However,the impact of temperature on heterogeneous chemical processes iS eonsiderable less．It is worth mentioning that how the surface heterogeneous reaction of HNO3 occurres will affect the components of the troposphere．
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