The different sharing proportion of revenue for operating airline determined the different value of O-D, and the operating airline decided to receive a ticket or the marking airline depends on the revenue sharing pro- portion instead of the ticket fare. So the optimizing of seat allocation depends on the revenue sharing mechanism. The paper abandons the original pattern and the airlines allocate their seat capacity according to the seats’ own value. Regarding the airline alliance as the auctioneer and seat capacity in an itinerary as lots, we establish the model of multi-stage dynamic combinatorial auction to allocate the seat capacity and get the maximize revenue of airline alliance. The numerical studies reveal solve the problem of the seat capacity allocation，which is prac- tical and innovative.