Abstract: ［Objective］ In order to improve the thermal environment of subway compartment in high temperature and humidity areas and achieve low-carbon energy-saving goals, it is necessary to study the current situation and comfort of subway compartment thermal environment. ［Method］ Field tests are conducted on the compartment thermal environment parameters of Fuzhou Metro Line 2 in the spring and autumn transition seasons, summer, and winter. Meanwhile, 1 027 valid questionnaires on thermal comfort evaluation of compartment passengers are obtained by questionnaire survey. Thermal sensation differences among different groups are analyzed. Thermal comfort differences of compartment passengers under different passenger capacities and weather conditions are studied, and the compartment thermal neutral temperature is calculated. ［Result & Conclusion］ There are differences between the subjective passenger evaluation and the actual compartment thermal environment parameters. The thermal neutral temperature 25.11 ℃ in summer is higher than the average actual compartment temperature, and thermal neutral temperature 11.67 ℃ in winter is lower than the average actual compartment temperature, indicating that the compartment is too cool in summer and the set temperature of air conditioning should be appropriately increased, while compartment is too warm in winter and the set temperature of air conditioning should be appropriately reduced.