The utility model provides a tangent tower for a +/- 800 kV ultrahigh voltage DC circuit 50 mm heavy ice area. A tower body is a secondary variable slop tower body, a tower head is in a cavel type and is composed of a lead cross arm and a ground wire support, the lead cross arm is placed on the tower body and extends on the two sides of the tower body, an opened trapezoidal cross arm is used, and two-time slop varying is used in the tower body. Leads on the lead cross arm are arrayed horizontally, and lead insulator chains are arranged in a V chain mode. The tangent tower for +/- 800 kV ultrahigh voltage DC circuit 50 mm heavy ice area has the advantages that the V chain mode is used for arrangement, on one hand, the width of a line corridor can be reduced, and damage to the environment is lightened; on the other hand, the main factor for controlling the weight of the tower in the heavy ice area is crankling combination caused by broken icing wires and uneven deicing, inter-electrode distances are decreased, torque generated under the icing condition of the tower can be effectively reduced, and the weight of the tower can be greatly reduced. Obviously, when V chain wire hanging mode is used in the tangent tower in the heavy ice area, obvious economic advantages are achieved.