In the process of regional integration, the passenger flow of intercity rail transit has become an important feature of urban functional linkage. Based on the behaviors of high speed rail trip travelers at Changchun and Jilin, the study surveys through interviews and ques tionnaires and analyzes the spatial integration feature indicated by the micro individual choices in intercity rail transit. The findings are: 1) respondents travel by HSR are mostly whitecollars with high educational level, strengthening the effect of social polarization manifested in the ma terial base of spatial flow; 2) both Changchun and Jilin are highdensity area of intercity passen ger flow while suburb districts are sparse area, meaning the spatial polarization is obvious and more passengers prefer going to Changchun instead of to Jilin; 3) when the variables of housing, d working and shopping are fixed, people with Jilin Hukou are more likely to choose to live in Changchun, signifying the unbalanced regional development in terms of intercity rail transit.%区域一体化进程中，城际轨道交通客流成为城市区域功能联系的重要表征，本研究选取长吉城际动车出行为研究对象，通过对乘客群体问卷访谈式的实证调查，从微观个体的角度分析城际轨道交通所表征的空间一体化。研究发现：（1）在总体的客流属性方面，乘坐动车的人群以高学历白领群体为主，表征了一体化进程中城际轨道交通作为流动空间物质基础的社会极化效应；（2）在到发客流空间分布方面，长春与吉林的中心城区都属于城际出行强度集中区，郊区县市属于客流稀疏区，空间分布的极化效应非常明显，同时相对于前往吉林市的客流来说，更多比例的客流以长春市为目的地：（3）在功能性活动空间交互方面，若固定户籍地考察居住、工作和消费等功能性活动的偏移，更多的乘客属于户籍地在吉林、其余基本活动在长春的情形，说明一体化进程中城际轨道交通客流表征了区域发展的空间不均衡。
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