The utility model discloses a liquid ammonia oil extraction recovery unit of system, affiliated field is chemical industry device design technical field, including oil water separator, the air supply import, gas exports, the profit import, the oil drain port, aqueous ammonia export, imports of liquid ammonia, steam inlet, the synthetic ammonia tower, oil water separator top left side is connected with the air supply import, the right side top that middle top was connected with gas exports oil water separator is connected with the profit import, near oil water separator's left side bottom is provided with the oil drain port, near oil water separator's right side bottom is provided with aqueous ammonia export, aqueous ammonia export links to each other with the aqueous ammonia import that sets up middle part on the left of the synthetic ammonia tower, the below that is located aqueous ammonia import is provided with steam inlet, the right side bottom of synthetic ammonia tower is provided with cold refrigerant outlet, be provided with the gas ammonia export directly over the synthetic ammonia tower, the utility model discloses a liquid ammonia oil extraction recovery unit of system, the feature of environmental protection is good, and economic benefits is bright good, and the synthetic ratio of liquid ammonia is high.