Abstract: It is stated the importance of oil tank accessories in North East of China and the problems of maintenance. The problems of respiration valve are mainly insufficient ability of anti-frozen, improper material selected, narrow air path, and bad maintenance, showing that gravity type of respiration valve or all weather respiration valve newly developed should be selected. The fire arrester is the problems of products in poor technic, less resistance of fire, low explosion protection, the possible of fire harzard or explosion. Selection of fire arrester according to national standards and ministry issued one is suggested that all weatherfire arrester, side took type of fire arrester, all weather arrester - respiration vavle should be adopted, they all are able to resist frozen, the problem of hydropressure safety valve is oil spraying, the cause is the trough of oil collecting is not high enough, and installation inclined. In addition, the maintenance of other accessories are also described.