Anthropogenic dust is an important constituent of airborne particles in the urban environment but its ice nucleation activity remains uninvestigated. Here, we studied the sources and ice nucleating properties of size-resolved particles in the urban atmosphere under mixed-phase cloud conditions. The heat-resistant ice nucleating particles (INPs) unexpectedly contributed ~70% of the INPs in coarse mode at temperatures below −15 oC. Detailed size-resolved particle chemical composition analysis showed that these INPs were contributed by anthropogenic dust, such as traffic-influenced road dust. A parameterization based on coarse particles was developed to predict the anthropogenic dust INP concentration, due to their correlations on concentration and similarity in chemical compositions. The parameterization can be used for further evaluating the anthropogenic dust contribution to INPs on a global scale. We suggest anthropogenic dust associated with rapid urbanization will become an important factor for urban climate change by altering the cloud microphysics.