Abstract: The light hydrocarbon recovery process by the use of ammonia refrigeration technology in Shenhua Erdos CTL Branch Co. was introduced. The operation practices indicate that the re-adsorption tower and ancillary facilities can be omitted from the original classical recovery process consisting of adsorption tower, re-adsorption tower, desorption tower and stabilizer when the ammonia technology is used and the temperature at the top of adsorption tower is controlled at 18.4℃. The C3+ in dry gas is only 1.96% (v). While C5+ in LPG is 0.07% (v), which meets the national standard of not more than 3.0% (v). The C3 yield reaches 94.0% (v), higher than the classical light hydrocarbon recovery process. In addition, raw material and liquid ammonia are from other units which can reduce the production cost and is good for resource optimization and integration between units.