A silence oxygen flowmeter comprises a body, an air inlet connector, an air outlet connector, a flow displaying pipe, an adjusting button, a humidification bottle and an overflowing pipe. The silence oxygen flowmeter is characterized by further comprising a shielding cover upper shell body and a shielding cover lower shell body. The small-opening end of the shielding cover upper shell body is connected with the body, the large-opening end of the shielding cover upper shell body is connected with the shielding cover lower shell body, and a formed sealing space wraps the humidification bottle. After the shielding cover upper shell body is connected with the shielding cover lower shell body, a formed sealing structure effectively and further insulates and reduces the noise led out from the humidification bottle, the silence of the oxygen flowmeter is achieved, and the problem that oxygen inhalation people and other patients in the same ward cannot fall asleep easily caused by the noise produced by an oxygen flowmeter in the prior art is solved. Meanwhile, the silence oxygen flowmeter has the advantages of being simple in structure, easy to manufacture, small in occupied space and low in cost.