The combination of a storage-charging-swapping integrated station (SCSIS) and integrated energy buildings (IEB) will be one of the important forms of multi-energy buildings in the future. This paper proposes a low-carbon economic scheduling method of SCSIS cooperating with multiple IEBs. First, a power sharing cooperative operation architecture composed of SCSIS and multiple IEBs is constructed. Secondly, based on the ladder carbon trading mechanism, a multi-agent cooperative low-carbon economic scheduling model is established in power sharing mode. Then, to maximize the interests of the main body, and based on Nash negotiation theory, the alternating direction method of multipliers (ADMM) is used to determine the power sharing price. Finally, the feasibility and effectiveness of the proposed scheduling model are explored through examples. The results show that the system can effectively reduce carbon emission while ensuring economy by introducing the power sharing and the ladder-type carbon trading mechanism, and prove that the ADMM has a good convergence for the determination of the power sharing price.