Disclosed is a contact system of a small-sized relay. The contact system comprises movable spring sheets and static spring sheets; one end of each movable spring sheet is arranged opposite to a staticcontact while the other end of the movable spring sheet is electrically connected with the corresponding static spring sheet through a wiring assembly; the wiring assembly comprises a wire and two elastic clamping parts arranged at the two ends of the wire respectively; the two elastic clamping parts are used for connecting the wire and each movable spring sheet, and the wire and each static spring sheet; and one elastic clamping part clamps the end part of each movable spring sheet and one end of the wire, while the other elastic clamping part clamps the end part of each static spring sheetand the other end of the wire. According to the contact system of the small-sized relay provided by the invention, the elastic clamping sheets arranged at the two ends of the wire are adopted to replace conventional welding, so that elastic clamping between the movable spring sheets and the static spring sheets and the wire is realized, convenient and reliable wiring is achieved, the assembling process is improved, influence to the contact caused by smoke generated in welding can be avoided, the welding quality can be improved, and the wire is assembled firmly without falling off easily.