Gastrointestinal endoscope mouthpiece with nasopharyngeal airway

The gastrointestinal endoscope mouthpiece with the nasopharyngeal airway is provided with a mouthpiece body, and the mouthpiece body is formed by integrally connecting an occlusion shell and an outer shell; the occlusion shell is an oval cylinder, the upper side and the lower side of the occlusion shell are each provided with an occlusion groove, a tongue depressor is arranged below the occlusion shell, a valve is arranged at the hollow position of the middle of the occlusion shell, and a gastroscope channel is formed in the valve. Two fixing elastic pieces are arranged on the side face of the valve and oppositely inserted into the outer shell, a circular gap is formed between the two fixing elastic pieces after the two fixing elastic pieces are combined together, and the circular gap forms a nasopharynx channel after the fixing elastic pieces are opened and can allow the breather pipe to pass through. The breather pipe is composed of a thick pipe and a thin pipe. And a suction tube through hole is formed in