In 2022, LPG market in China will be in shortage, in order to improve pipeline delivery efficiency, reduce the potential safety hazards for plant and downstream user and improve the economic efficiency of the oil & gas treatment plant, the light hydrocarbon shall be recovered in respond to the concept of low-carbon and economical production.The gas sources, process scheme, construction & operation risk and economic benefits of certain condensate gasfield light hydrocarbon recovery project at Qinghai have been analyzed.It is concluded that the LPG shortage can be relieved to certain extent with the completion of this project, which has good market prospects. The mixed refrigerant is adopted for refrigeration and the energy consumption is relatively lower. It has strong adaptability to service variation.The annual sales of LPG and stable light hydrocarbon total about 181.7 million yuan. With higher investment return, the construction is feasible.