Passengers in the departure hall of a terminal usually travel in small groups, and their evacuation behavior is different from that of individual passengers. To analyze the behavioral characteristics of small groups of passengers, the social force model from the expected speed and the internal force of small groups were improved; for the evacuation process,a multi-intelligent body technology evacuation simulation model was established, and the evacuation scenarios of small groups of passengers in different areas was simulated with different ratios in the departure lounge of a certain terminal as an example.The results show that with the increase of the ratio of small group passengers, the evacuation time and average detour distance in the whole area are also increasing, and the evacuation time in the rest area is longer than that in the commercial area