C2 gas recovery system capable of improving C2 component recovery rate

The utility model discloses a C2 gas recovery system capable of improving the C2 component recovery rate, which comprises a C2 gas separation unit for recovering C2 components from feed gas, a compression unit connected with the C2 gas separation unit and capable of compressing the C2 components, and a refining unit connected with the upper end of the compression unit and capable of refining the C2 components to obtain C2 product gas, the flash evaporation unit is connected with the lower end of the compression unit and can be used for flash evaporation of the liquid C2 component in the compression unit into gas, and the C2 gas output unit is connected with the refining unit and the flash evaporation unit and is used for outputting C2 product gas. According to the C2 gas recovery system, liquid obtained due to pressure rise in the compression unit is recovered, so that the recovery rate of a C2 component in the C2 gas recovery system is improved, the recovery rate of the C2 component is effectively improved,