The paper analyzed the migration rule and the influencing factors of benzene and toluene from external coatings to internal coatings by high performance liquid chromatography (HPLC) method. The cans were stored at different stacking temperatures, stacking pressures and stacking humidity for two months. 10% ethanol simulated liquid was used to extract benzene and toluene in the internal coatings, and the orthogonal experiment was used to get the storing condition for the minimum migration. The results showed that benzene and toluene were not detected in the internal coatings without stacking, while a certain amount of benzene and toluene was detected in the stacking samples. The influence of stacking temperature on the experiment results was significant.