Abstract: To appropriately use different kinds of crude fish oil resouces, selected pressing oil, weak alkaline cooking oil and solvent extraction oil respectively, each of them divide into 3 types:stored for one day, one week and one month. By single factor and orthogonal test determined the best decoloring conditions:using3.5% of active clay and 0.3% of active carbon at 95℃ for 30min.The ratio of decolourization was 90.7%.As a result:the processing period of fish oil is less than a week. For decoloring of the pressing oil and weak alkaline cooking oil, we just use carclazyte, but for the solvent extraction oil, we must use carclazyte and active carbon.