Abstract: Degumming process of cold pressed carrot seed oleic acid was optimized.Citric acid was selected as degumming acid by single factor experiment.Effects of four experimental factors，amount of acid，amount of water，temperature and time of degumming，on degumming rate of cold pressed carrot seed oleic acid method were analyzed，as well as effects of two experimental factors on degumming rate.According to single factor and response surface optimization experiments，the order affecting degumming rate of acid method was as follows:amount of water added>amount of acid added>degumming temperature>degumming time.Degumming rate was the highest when amount of acid was 0.25%，amount of water was 3%，degumming temperature was 59 ℃，and degumming time was 29 min.At that time，degumming rate of cold pressed carrot seed oil by acid method was 70.20%，which was close to predicted value of model of 70.98%，indicating that this process was more reliable and had certain reference value.