Abstract: Under the background of the "dual carbon" goals, constructing an efficient and low-carbon integrated energy system has become an important pathway to achieving sustainable development. This paper proposes a low-carbon economic dispatch model tailored to the multi-energy coupling characteristics of electricity, natural gas, and hydrogen within a park. The model comprehensively considers the carbon trading market mechanism and load demand response, aiming to minimize system operating costs, reduce carbon emissions, and achieve a high proportion of renewable energy consumption. By introducing the carbon trading market mechanism to quantify carbon emission costs and combining it with load demand response technology to optimize user-side energy consumption behavior, the system is optimally dispatched using a mixed integer programming algorithm to coordinate the operation of electricity-gas-heat-hydrogen multi-energy flows. Simulation results demonstrate that the proposed model can effectively reduce system carbon emissions by 12.92% and operating costs by 10.48%, while simultaneously enhancing the capacity for renewable energy consumption.