Abstract: Oxygen-enriched combustion technology can achieve near-zero emission of carbon dioxide from coal-fired units, and is an effective means to achieve low-carbon scheduling. In this paper, oxygen enriched combustion technology is introduced into the comprehensive energy system of electricity gas heat, a low-carbon economic dispatching model was established, which can balance economic and low-carbon. Firstly, by excavating the operating mechanism of the oxyfuel combustion plant, the internal energy time shift characteristics were studied and compared with the post-combustion capture plant to analyze its advantages in reducing carbon emissions. Secondly, a low-carbon economic scheduling model of electricity gas heat integrated energy system was established with the lowest comprehensive cost such as operation cost, maintenance cost, depreciation cost and carbon trading cost. The solution was solved by CPLEX. Finally, the integrated energy system of IEEE-30 node grid model, 7-node gas network model and 6-node heat network model were simulated to verify the effectiveness of the model. This paper provides a reference for the low-carbon dispatch operation of integrated energy systems.