Abstract: In order to realize the low-carbon emission of power system and boost the economic growth, a bi-level optimal dispatching strategy based on the demand response considering nodal carbon intensity is proposed, which uses the model of carbon intensity guided multivariate flexible load as basic. First, by using the principle of proportional sharing to track the carbon emission flow, a carbon emission flow model is built, and the carbon intensity variation law of each node is perceived from a spatiotemporal dimension. Then, the carbon flow analysis is incorporated into the load-side demand response mechanism, the nodal carbon intensity is used to establish the carbon emission model of demand response for load aggregators, and the dispatching differences of load aggregators under different carbon intensities are clarified to build a bi-level optimal dispatching model of power system based on demand response considering nodal carbon intensity. The upper-level of the model is the optimal economic dispatching of power grid operators, and the lower-level of the model is the demand response economic dispatching of load aggregators. Finally, the effectiveness of the proposed method is verified by a modified IEEE 30-bus system.