Abstract: The standards of comfort property of working environment in tunnels in China and abroad are comparatively analyzed in terms of temperature, humidity and air velocity. Suggestions are made on the comfort property of working environment in tunnels. Comparison and contrast are made on the examination and evaluation methods of the comfort property, and rational examination and evaluation methods are determined. Measures to adjust the comfort property of the working environment in tunnels are proposed.

Key words: tunnel, temperature, humidity, air velocity, comfort property