Modular exhalation valve and breathing machine with same

The utility model provides a modular exhalation valve and a breathing machine with the same. The modular exhalation valve comprises an exhalation valve seat, an exhalation valve body assembly and an exhalation valve knob, the exhalation valve body assembly comprises an exhalation valve body, a pressure collecting module, a valve sealing module and a differential pressure flow sensor module, and the differential pressure flow sensor module is detachably inserted into the exhalation valve body. The exhalation valve body assembly is assembled and contained in the containing cavity, the air inletend of the exhalation valve body assembly extends out of the opening end of the containing cavity, the exhalation valve body and the exhalation valve seat are stably connected through the exhalation valve knob, a communication channel of the pressure collection switching silica gel block and a metal pressure collection block of the exhalation valve seat are matched and sealed after assembly is completed, and pressure samp