In the process of controlled atmosphere storage of fruits, the environment of low oxygen concentration and high carbon dioxide concentration has been maintained in the controlled atmosphere room. In this environment, people cannot survive. Therefore, when fruit is put into storage, it is not suitable for people to put into storage. Even if there are oxygen respirators, they will only work in the warehouse for a short time under special circumstances. This requires the equipment in the warehouse to be safe and reliable, and avoid storage as much as possible. Operators and maintenance personnel must know that at this time, if there is no breathing apparatus, the gas in the controlled atmosphere storage can not sustain people's lives, and if it is mistaken for the controlled atmosphere storage, it will lead to life danger. Therefore, the controlled atmosphere storage should be equipped with breathing tools, and operators and maintenance personnel should be familiar with the use, maintenance and bamboo preservation of breathing tools. They should be disinfected before and after use. The performance of oxygen storage and absorbent in six oxygen cylinders should be checked regularly, and oxygen should be replenished and absorbent replaced in time to make the oxygen respirator in a good standby state. At least two sets of tested breathing devices should be prepared.