Abstract：The Broker pilot has brought new opportunities for the development of modern logistics in China. Based on the multi-agent modeling technology, a simulation model for the intermodal logistics service of highway & railway multimodal transportation is constructed. On the Anylogic platform, the behavior rules and the relationship between the participants in the non-cooperative and cooperative situations are simulated. The mechanism of the coordinated formation of the intermodal logistics service is given through the comparative analysis. The research results show that the demand of highway & railway multimodal transportation logistics service is flexible and the market competitiveness of its substitute is strong. The Broker plays a leading role in collaborative logistics services, and could help enhance the effectiveness of each participants to meet the logistics service demand better.