In order to fully explore the dispatching potential of integrated energy microgrid(IEM)and promote the transformation of new power system,a collaborative distributed optimal operation method for multi-integrated energy microgrid access to distribution network was proposed.Firstly,an IEM model was constructed,and the multi-type applications of hydrogen energy,including combined heat and power(CHP),hydrogen fuel cell(FC)and hydrogen storage,were constructed to form a comprehensive energy microgrid with electricity-carbon-hydrogen coupling.Reduce carbon emissions and exploit the full potential of carbon capture units and hydrogen dispatch.Then,after the construction of the single microgrid model,aiming at the problem of multi-integrated energy microgrid access to the distribution network,the integrated energy microgrid and the distribution network are regarded as different sub-regions,and the distributed optimal operation model of multi-integrated energy microgrid access distribution network is established.The alternative direction method of multipliers(ADMM)was used to solve the model.Finally,the simulation results based on the improved IEEE33-node distribution network show that the system scheduling cost is reduced by 10%and the carbon emission is reduced by about 65%after the multi-EM access distribution network system considering the electricity-carbon-hydrogen coupling,and the difference between the results obtained by distributed optimization and the centralized one is only 0.8%,which verifies the effectiveness and superiority of the proposed method.