By adjusting the coating construction performance and process parameters, optimizing the fit of the construction technology and coating itself, determining the material viscosity, sag, spray speed control within a certain range, the oilfield buried long-distance pipeline leak caused by pitting corrosion was solved. Thus, the service life of petroleum pipeline was improved, the maintenance cost and operation cost of buried pipeline were reduced to a certain extent, and the positive development of petrochemical industry has a good promotion effect.