Abstract: With the increase of the number of electric vehicles (EV), the integration of massive disorderly charging loads into power grid will bring effects such as low voltage and transmission congestion. This paper proposed the EV demand response technology based on traffic-grid coupling networks, by which the spatial and temporal distribution characteristic of EV charging loads can be accurately forecasted and reasonably dispatched, to alleviate or solve the power grid problems caused by large-scale EV disorderly charging. Firstly, the interaction of the traffic information and the power grid operation was analyzed, and the coupling principle of the traffic network and the power grid was proposed. Based on the consideration of the influence of traffic-grid coupling on the behaviors of EV, a charging load forecasting model was established to obtain the spatial and temporal distribution characteristic of the aggregate EV charging loads. Then demand response strategies considering the dispatching discrepancy of fast charging and slow charging was proposed, in which the fast charging dispatching can reduce charging loads in a short time and the slow charging dispatching can transfer the charging periods of massive EVs. Finally, simulation results show that considering the traffic-grid coupling can make the EV charging load forecasting more accurate and effectively alleviate the voltage deviation and the transmission congestion in the power grid.