Abstract: As a large number of distributed energy devices are integrated into the distribution network and gradually participate in distributed tradings, the distribution network operation is developing towards distributed and interactive directions, showing a more flexible and ever-changing trend. In recent years, the stand-alone operation mode can no longer meet the boundary matching requirements because of the rapid development of integrated energy systems and the deepening degree of coupling between the power system and the natural gas system at the distribution network level. This paper designs a centralized trading market mode on the distribution network side that considers the participation of distributed resources, and establishes trading models of distributed photovoltaics, distributed energy storage, electric vehicles, etc. Furthermore, a distribution-level joint clearing model of the gaselectricity integrated energy system considering the distributed resource trading is constructed. The second-order cone relaxation method and the Taylor series expansion are used to linearize the power flow and the gas flow constraints. The price signals of the electricity-gas integrated system are reflected by node prices of distribution network and time-of-use tariffs of gas networks. Finally, the validity of the proposed market mechanism model is verified based on an improved gas-electricity integrated system.