Abstract: Accelerating the implementation of electric energy substitution is an important measure to achieve the goal of“carbon emission peak and carbon neutrality”. However, a considerable part of carbon emissions cannot be eliminated by direct electric energy substitution, including the industrial carbon emissions represented by iron and steel. The vigorous development of new energy and hydrogen energy, especially the deepening coupling between them, provides an opportunity to reduce industrial carbon emissions. This paper focuses on the analysis of the characteristics of the energy systems in the iron and steel parks, and optimizes the traditional energy system in the iron and steel parks by introducing new energy power generation, electrolytic water hydrogen production and hydrogen heavy duty trucks. Based on coupling link modeling, a planning model is constructed, which takes the maximum net present value of the income of the iron and steel park as the objective function and takes the conversion relationship and connection characteristics of each component as the constraints. The influence of the electricity market, carbon market,capacity reduction policy and equipment price on the system planning and allocation is analyzed, and the “preference”characteristics of planning schemes are further explained by describing system investment risks. Finally, the key problems that need attentions are expounded from three aspects of system construction, system regulation and project promotion.