The embodiment of the invention discloses a socket conductor and a socket system. The socket conductor comprises a socket body, an inclined oval two-way spiral spring contact finger, a single-line spring and an offset-line spring, wherein the inclined oval two-way spiral spring contact finger is spirally surrounded into a unit ring by a spring wire along an inclined oval track, the unit ring is in two-way spiral wounding along the axial line, the inclined oval two-way spiral spring contact finger is sheathed on the single-line spring and is embedded into a groove of the offset-line spring in an adapting way, the inner circumference of the spring contact finger forms an insertion hole, and the offset-line spring is arranged in a socket body hole. When a plug is inserted into the socket conductor, the inner wall of the inclined oval two-way spiral spring contact finger is extruded by the plug to deform, the inclined oval deformation of the unit ring is gradually generated in the spiral axial direction in the insertion process, the contact points and the contact paths of the plug and the socket conductor are increased, on the basis, the stress deformation degree becomes lenitive, the contact is more reliable, and the contact impedance is more stable.