Clinical anesthetic gas concentration control device

The invention discloses a clinical anesthetic gas concentration control device which comprises a shell, a mixing assembly is arranged in the shell, a gas metering assembly is arranged below the mixing assembly in the shell, the gas metering assembly is communicated with the mixing assembly, the mixing assembly is communicated with an oxygen pipe, a connector is arranged outside the shell, the gas metering assembly is communicated with the connector, and the oxygen pipe is communicated with the connector. The mixing assembly comprises a mixing cylinder, a first piston, a first automatic telescopic rod, a gas inlet pipe, a first valve body and a gas outlet pipe, the mixing assembly pulls the first piston downwards through the first automatic telescopic rod to introduce quantitative anesthetic gas and oxygen into the mixing cylinder, the gas is fully mixed by pushing the first piston, then the first piston is pushed upwards, and the gas is fully mixed; the mixed gas is uniformly discharged and supplied to a pati