Abstract: In response to the high temperature and high humidity conditions in underground mining operations,a solution involving the use of individual thermal protection equipment is proposed.2 types of individual thermal protection equipment utilizing phase change materials have been developed,and a subjective evaluation scale consisting of 5 categories has been used to assess the performance of the thermal comfort,tactile comfort,garment comfort,fabric feel,and usability for the test subjects.The results indicate:①Both types of thermal protection equipment received favorable ratings for thermal comfort from the test subjects,but they became relatively humid over time due to the evapo-ration of bodily sweat,indicating the need for improvement in dehumidification performance;②Towards the end of the testing period,the horizontal-ion thermal protection equipment received a positive assessment for usability,while the vertical-ion thermal protection equipment only received a slightly usable evaluation,with test subjects expressing negative feelings about the sagging sensation caused by the phase change materials melting;③Overall,test subjects showed a preference for the thermal protection equipment with phase change materials utilizing horizontal ion,indicating that the optimization research for the vest-style thermal protection equipment has yielded positive results.