Abstract: In order to further reduce the carbon emissions level of the hydrogen integrated energy system（HIES） and improve the operational economy of the system, an optimal scheduling strategy of HIES under the integration mechanism of green certificate and carbon trading mechanism is proposed. Firstly, the composition and operation characteristics of HIES are analyzed, and two types of demand response（DR） models are established, namely, the day-ahead price-based model and the substitutable model; Secondly, a ladder green certificate trading model is constructed, and a green certificate-carbon trading integration mechanism is designed. A HIES optimization scheduling model is established with the goal of minimizing the comprehensive cost of energy purchase costs, carbon trading costs, and ladder green certificate trading profits; Finally, the effectiveness of the proposed strategy in this paper is verified through simulation cases, and the impact of the length of the ladder interval and the basis price on the scheduling results of green certificates and carbon trading are analyzed.