Abstract: Integrated energy microgrid is an effective way to realize comprehensive utilization of clean energy, cascade consumption and improve energy utilization efficiency. If the market-oriented interactive competition can be introduced into many main source loads of multi microgrid, the market vitality can be stimulated and the healthy development of integrated energy microgrid can be promoted. In this paper, based on the heat transaction demand of multi electric thermal microgrid marketization, a multi microgrid time-sharing optimization market trading mechanism based on master-slave game considering thermal energy classification was studied. Firstly, based on the different demand of thermal energy quality between civil microgrid and industrial microgrid in different periods, a time-sharing supply strategy using balanced thermal energy and graded thermal energy was proposed. Furthermore, the market transaction mechanism was further studied, and the principal-slave game was introduced to solve the interest conflict among participants in the collaborative optimization process. Finally, the results of the calculation example show that the proposed strategy improves both the revenue on the energy supply side and the utility on the energy consumption side of the transaction, and at the same time improves the energy utilization rate, which is in line with market-oriented transaction expectations.