The human thermoregulatory system is introduced in the paper at first. The study status for the mathematical models of human thermal regulation system is surveyed. A comparative review of characteristics of several existing human thermal models is undertaken. The models receiving consideration in this study are NASA's 41 nodes man model, Kuznetz's model, Wissler's model, Werner's model and those developed at Beijing University of Aeronautics and Astronautics. The characteristics compared include anatomical...