Abstract: Low temperature separation process was used for Jiangyou natural gas condensate recovery unit to recovery the components of C₃⁺ from the natural gas. The design treatment capacity is 450×10³ m³/d, and now the practical natural gas processing capacity is 400×10³ m³/d. At present, the Zhongba Xuer Gas Reservoir indicates a flow decrease trend for high pressure gas and flow increase trend for low pressure gas. The feed gas pressure fluctuates significantly, and the high pressure gas pressure has reduced from 3.65 MPa to about 2.8 MPa. The main production parameters of light hydrocarbon recovery unit deviate from design value obviously. In addition, after the implementation of GB 11174-2011 Liquefied Petroleum Gas on July 1st, 2012, it is required that the volume fraction of C₃ and C₄ hydrocarbon components should not be less than 95%, which would influence the operation parameters, the liquefied gas production and the C₃ yield to a certain extent. At present, by the premise of the liquefied gas quality meeting the new national standard, the C₃ yield is only 61.12%. Under the condition of existing equipment, the sensitivity of the relevant parameters was analyzed by means of computer simulation software. According to the current situation and the main sensitive factors, some measures were proposed to improve the C₃ yield, which included improving the feed gas pressure, reducing the feed gas temperature, making the deethanizer reboiler temperature stable, optimizing the parameters and reforming the process.