For indoor and outdoor spaces composed of multiple spatial units,different thermal experiences may arise due to the influence of different user behavior choices(such as path,dwell time,etc.),leading to a differentiated overall thermal comfort experience.Some special thermal units(such as excessively long dwell times and excessively discomfort)are sufficient to have a global influence on overall thermal comfort and require special attention.However,there is currently limited research,and the influence of special thermal units on overall thermal comfort needs to be further explored.This article takes this as the starting point and focuses on exploring the influence of uncomfortable thermal units on overall thermal comfort through on-site experiments,questionnaire surveys,environmental measurements,and other methods in a certain university's School of Architecture.The results show that when the residence time of the uncomfortable thermal unit reaches as stable state,the uncomfortable thermal unit will have an undeniable adverse effect on the overall thermal comfort;The greater the proportion of time spent in uncomfortable thermal units to the overall activity time,the greater the influence on overall thermal comfort;When the dwell time of the uncomfortable thermal unit does not enter as stable state,the longer the dwell time tends to stabilize,the greater its influence on overall thermal comfort;The influence of uncomfortable thermal units on overall thermal comfort is also related to their degree of discomfort.When the PET is ≤9.23 ℃,it has a negative impact on overall thermal comfort.This study further develops the research on the accumulation of thermal comfort time,and can provide a basis and more targeted ideas for optimizing the thermal environment of existing spaces.