Abstract: Based on corrosion situation investigation and influence factor analysis on different types of wastewater tanks in Changqing Oilfield, corrosion control measures taken over the years in waste water tanks in the Oilfield are summarized, including coating protection technique and protection technique of coating combined with electrochemistry.Inner surface corrosion control method of wastewater tank includes epoxy glass flake coating material, modified epoxy resin, epoxy-glass liner method and internal corrosion control method by supersonic speed complex spraying process.Application shows that there are advantage and disadvantage in each method.While external surface corrosion control of wastewater tank is to take relative special measures according to different positions of the tank, external environment and coating materials used.The authors propose that coating combined with electrochemistry technique to prevent wastewater tank from corroding is a main corrosion control method in Changqing Oilfield, and future research development direction in corrosion control technique of wastewater tank is presented at the same time.