The invention relates to the technical field of ferrous metallurgy, in particular to a safety interlocking device of a thin oil sealing dry gas holder. The safety interlocking device of the thin oil sealing dry gas holder comprises a counter weight pendant mound, the two sides of the counter weight pendant mound are provided with fixing devices, the fixing devices are provided with clamping grooves, and the clamping grooves are formed in a pendant mound guide rail. The upper end and the lower end of the pendant mound guide rail are respectively provided with an interlocking switch, the middles of the interlocking switches are hinged to a gasometer shell, and one end of the gasometer shell is arranged on the pendant mount guide rail. The safety interlocking device of the thin oil sealing dry gas holder has the advantages that interlocking misoperation can be avoided, and safety operation factors can be improved.