Breathing air feeder with triple protection function

The invention discloses a breathing air feeder with a triple protection function, relates to the technical field of breathing air feeders, and aims to solve the problems that an existing breathing air feeder is hurt due to misuse, a user cannot be reminded when a filter part fails, the user only needs to replace the filter part by experience or when smelly toxic gas, and the use cost is low. In order to solve the problems that a filter part of an air feeder without a self-closing valve needs to be replaced outside a toxic area, and the using effect is not ideal enough, the following scheme is provided: the air feeder comprises an air feeder shell, a bandage is arranged on the air feeder shell, and a first filter part is arranged on the air feeder shell. The breathing mask is reasonable in design and has a triple protection function, the fan is not started when the oxygen content of the working environment is smaller than 15%, harm caused by misuse is effectively prevented, an alarm can be given out at the mom