Multi-stage protective mask

The utility model provides a multistage protective mask which comprises a mask face provided with elastic ear hanging belts and a nose clip, at least one breather valve is installed on the mask face, and the breather valve comprises a valve body composed of a valve seat and a valve cover and a replaceable filter element installed in the valve body. The mask further comprises goggles, tooth chain belts I matched with each other are arranged on the lower edge of the goggles and the upper edge of the mask face, and the goggles and the mask face are detachably connected through a zipper structure. According to the multi-stage protection mask, the mask face and the face mask are detachably connected and can be combined into a whole with better protection performance; the breather valve is provided with a replaceable filter element, and the filter element can be selected according to epidemic prevention levels, so that the breather valve has better protection and usability. 本实用新型提供多级防护口罩，包括配有松紧挂耳带和鼻夹的口罩面，口罩面安装至少一个呼