Abstract: Situation of LNG cold energy utilization is presented internationally and necessity for providing Guangdong Dapeng LNG Receiving Station with lighter hydrocarbon separation apparatus based on LNG's chemical components and cold energy utilization is expounded and techniques required to be solved for realizing lighter hydrocarbon separation are pointed out, meanwhile, keep the gas pipeline operating stably under high pressure and provide the lighter hydrocarbon separation apparatus with stable feeding volume and fix on the principle of providing lighter hydrocarbon separation apparatus.Through combined process study and simulating calculation, make both apparatus and receiving station operate under optimized status, which not only solves the issue of influencing on the lighter hydrocarbon separation apparatus caused by fluctuation of gasified volume transferred from the receiving station, but also ensures gas supply to users from Guangdong Dapeng LNG Company continuously and safely.