Thermal sensation is human’s perception of the surrounding temperature, humidity, and other environments. In order to study the thermal sensation of ethnic minority groups in fluctuating climatic environments and make them adapt to different environments more quickly, the classroom environment of Dalian in winter was tested on the spot, and the clothing and thermal sensation of 80 Han students and 88 ethnic minority students (24 Hui, 12 Mongol, 14 Tujia, and other minorities) from different climatic zones were investigated by questionnaires. The results were analyzed by regression. The data of different ethnic minorities were compared, the reasons for the differences were analyzed, and the experimental results were verified. Results show that the comfortable temperature range of the minority students was between 18.5 ℃ and 19.4 ℃, which was different from that of Han students. According to the thermal sensory voting (TSV) model, the actual thermal neutral temperatures of students of different ethnics were 18.5 ℃ for Hui, 16.9 ℃ for Mongol, and 15.0 ℃ for Tujia. The predicted mean vote (PMV) model could not accurately predict the true thermal sensation. On the basis of the thermal sensation adaptability model (aPMV), parameter λ was put forward as a reference for all ethnicgroups, namely, Hui -0.79, Mongol -0.90, and Tujia 0.97. There were great differences in the indicators of different ethnics. It indicates that students have certain adaptability to the local climate, while studying in Dalian is accompanied by climate fluctuations, which makes students unable to adapt quickly to the new environment. Hence, the aPMV model was used to predict the thermal sensation of ethnic minority students, and a scheme of laboratory thermal reconstruction was provided.