The present invention relates to the technical field of high-voltage switch devices, and particularly relates to a support conductor and a high-voltage switch using the conductor. The support conductor includes a recessed opening. The recessed opening includes a bottom surface used for fixing a static contact and used for conductively contacting with the static contact, and a side wall used for shielding the static contact. The support conductor of the present invention is provided with the recessed opening allowing the static contact to sink into, the bottom surface of the recessed opening is in conductive contact with the static contact, the side wall of the recessed opening can shield the static contact, and an extra shielding structure is not needed. In addition, after the static contact is installed, the height is lowered, so that the diameter of a switch cylinder is effectively reduced. Due to the compact structure design of the support conductor, product assembling difficulty is lowered, the production cycle is shortened, and the product structure is optimized, further, a good electric field structure is obtained, and the electrical property of the product is improved.