High-pressure volumetric-method gas absorption system

The utility model discloses a high-pressure volumetric-method gas absorption system, which comprises an absorption tank, a gas filling sub-system, a degassing sub-system, an absorption measuring sub-system and a data acquisition processing sub-system, wherein the absorption tank is used for accommodating a detection sample; the data acquisition processing sub-system comprises a data acquisition sealing cover, a data sampler and a microcomputer processing device; the data acquisition sealing cover is used for sealing the absorption tank; a high-pressure valve and a pressure sensor are arranged on the data acquisition sealing cover; the high-pressure valve is connected with a gas output end of a depressurizing tank; a signal output end of the pressure sensor is connected with a signal input end of the data sampler; and the signal output end of the data sampler is connected with the microcomputer processing device. By organically combining the gas filling sub-system, the degassing sub-system, the absorption meas