Abstract: This article presented the application of thermal manikin to the design and evaluation of proctective clothing in detail,which included air ventilated suit,water cooled garment and cold weather clothing in respect of distribution of air flow,thermal insulation ,surface heat fluxes and the rate of heat removal affected by inlet water temperature and water flow rate et al. Its purpose is providing some suggestion in the practice of thermal manikin technique for the design and evaluation of thermal conditioning function of space suit.