Military sealed cabin is one of the most important work places and combat environments in future wars. Especially in army sealed cabins exist numerous harmful factors

and the condition is much worse than any other common operation cabins. The separate or combined effects of those harmful factors not only affect combat capacity of tank crews

but also cause lots of diseases and even threaten their lives. How to evaluate and protect our crews from these harmful factors is a new challenge faced by the army of each country. This article provides an overview of hazard assessment and health effect of operation environment in sealed cabins of our and foreign armies as well as the future research trends in this field.