Abstract: High speed railway station is an important node for intercity passenger trips, its connection with other transportation modes is a key factor to influence the overall efficiency of passenger trip. Taking Shenzhen North Railway Station as an example, the efficiency loss caused by repeated security check for transfer passengers is studied by using the queuing theory, and the possibility of eliminating the repeated security check is discussed. The research shows that after mutual safety check recognition, passengers transferring from Shenzhen North Railway Station to metro can save 4.5 minutes on average and up to 10 minutes in peak situation. While transferring from metro to railway, passengers can save 2 minutes on average. Since the security check recognition for transfer passengers is required by architectural design of high speed railway stations and security standards, the implementation scheme should be explored according to different stations and security standards.