Gas-consuming type pressure-stabilizing and gas-retaining experimental device and experimental method for microorganism culture

The invention discloses a pressure-stabilizing and gas-retaining experimental device and experimental method for gas consumption type microorganism culture, and solves the problems that in the prior art, the gas component testing precision of methane-oxidizing bacteria cultured in a laboratory is not high, and the gas consumption cannot be quantitatively calculated. The pressure-stabilizing and gas-protecting experimental device comprises an outer glass bottle, an inner glass bottle and a balance glass tube, a sealing cover plate is arranged on the outer glass bottle, the inner glass bottle is located in the outer glass bottle and suspended on the sealing cover plate through a sealing plug structure, and the balance glass tube is communicated with the inner glass bottle through a connecting tube penetrating through the sealing plug structure. And the inner glass bottle is provided with standard scales and air holes. The internal pressure of the external glass bottle can be balanced by utilizing the internal a