According to various situations in the process of active service, the corresponding damage severity of organic coatings was simulated using green organic coatings as object of research, which was widely used in military vehicle. Electrochemical test was carried out in 3.5% NaCl solution. The features of damage severity were revealed and some related influencing factors were discussed. The purpose was to provide theoretic basis for field test on the damaged coatings of military vehicle equipment.