This paper summarizes systematically the recent progresses in corrosion influences and rate prediction of sweet corrosion affected by crude oils, introducing the methods of studying corrosion process of sweet corrosion, and bringing forward the issues that may be paid special attention to while studying the influence of crude oils. However, crude oils usually demonstrate some inhibition in specific conditions. Corrosion product film and oil wetting are two great differences in existent rate prediction model in sweet corrosion. However, the approaches and manners to dispose crude oils will affect the prediction results no doubt. It is remarkably beneficial to study and develop an appropriate prediction model if the properties and laws toward sweet corrosion of crude oils are been studied thoroughly. And there is a realistic meaning in saving investment and operational costs while utilizing the possible inhibition of crude oils.