The invention provides a wire connection fitting for an extra-high voltage converter station. The wire connection fitting comprises a flat plate type port, a first port and a second port, wherein the flat plate type port is used for connecting a flat plate type terminal board; the first port is fixed on the flat plate type port and is used for connecting a first wire; the second port is fixed on the flat plate type port, and is used for connecting a second wire. Connection between the terminal board of an isolating switch or the terminal boards of other equipment and two wires can be completed by utilizing one wire connection fitting provided by the invention; the number of the fittings is reduced; engineering investment is reduced. Both the wires are connected at the position of the flat plate type terminal board, thus, concentrated loads cannot be added at the middle positions of the two wires, deformation and stress increase of the wires also cannot be caused and stress safety and attraction of the integral connection are ensured.