Device for detecting air output of breathing machine

The utility model discloses a breathing machine air output detection device which comprises a bottom pipe and a fixing pipe, the left side of the fixing pipe is communicated with an air outlet pipe, the left end of the air outlet pipe is provided with a one-way valve, the left end of the one-way valve is provided with an air conveying pipe, the top of the fixing pipe is in bolted connection with a box body, and the front face of the box body is provided with a displayer. A connecting block is connected to the bottom of the box body in a bolted mode, a detector is arranged at the bottom of the connecting block, the bottom of the detector penetrates into an inner cavity of a fixing pipe, a first sealing ring is bonded to the top of the inner cavity of the fixing pipe, and an inner ring of the first sealing ring makes contact with the surface of the detector. When the device is not used, the threaded groove is shielded, so that dust is prevented from entering the bottom pipe and the fixed pipe, the sealing plate