The invention provides a drop corner tower for cable breaking of a dual circuit overhead transmission line. The drop corner tower comprises a tower body, a top ground line crossbar, an upper wire crossbar, a middle wire crossbar, a lower wire crossbar, a bottom auxiliary crossbar, a cable suspension bracket and an inverse-y-shaped cable drop terminal. The top ground line crossbar, the upper wire crossbar, the middle wire crossbar, the lower wire crossbar and the bottom auxiliary crossbar are in T-shaped arrangement. Upper and lower directions are the same. A ground line is hung on one side of the overhead line. A certain angle is formed with the line. The drop corner tower provided by the invention has the advantages that the drop corner tower for cable breaking of the dual circuit overhead transmission line realizes cable breaking simply through a base dual circuit cable breaking tower; the construction cost is low; less area is occupied; the original line arrangement manner is not changed; the drop corner tower is suitable for single-side or dual-side cable breaking of the dual circuit overhead transmission line, and is suitable for adjacent tangent tower construction.