Abstract: The risk of crowd gathering in open public places is prominent, and conventional evacuation measures cannot effectively alleviate the risk situation of crowd gathering inside and outside the place. It is of great significance to master the characteristics of evacuation behavior of people in emergencies. Shenzhen Dongmen Pedestrian Street was selected as the research area to carry out a questionnaire survey on evacuation behavior, and three evacuation behavior tendency scenarios were developed according to the crowd gathering state, namely, obedience of personnel, gathering congestion response and emergency evacuation response. SPSS 25.0 Chi?square test was used to analyze the correlation between basic characteristics such as gender, age，group and evacuation behavior tendency. The results show that: （1） there are old and young groups, carrying packages and low environmental familiarity in pedestrian street, which affect evacuation efficiency. （2） a small number of people may continue to stay and take photos, wait for a long time, watch after encountering gathering congestion, or watch or even return after being evacuated to a safe area, which may lead to the internal gathering of the site can not be effectively alleviated, and form a new risk point of crowd gathering in the periphery. （3） the three groups of "male, large group and short?term tourists" have poor evacuation behavior, and the proportion of gathering, staying and returning is higher, especially the large group with 4 or more people are more likely to take the harmful behavior of crowding forward.

Key words: open public places, emergency, evacuation, crowd risk, evacuation behavior