Aiming at the goal of protecting the personal safety of high temperature workers and reducing the cost of R&D in enterprises, the article put forward the optimization of the thickness of high temperature protective clothing. A one-dimensional unsteady heat conduction model is constructed by combining the heat conduction equation with the definite solution conditions established by the initial state and boundary state to represent the temperature conduction process of the external—high temperature protective clothing—human epidermis system. Th...