The invention relates to a self-resetting one-way sliding tensile support seat. The support seat comprises a lower support seat plate, a spherical sliding plate, a spherical crowning lining plate, anintermediate lining plate and an upper support seat plate, the bottom of the lower support seat plate is used for being welded and fixedly connected with a bridge pier, the spherical sliding plate ismounted on the upper portion of the lower support seat plate, the spherical crowning lining plate is mounted in the spherical sliding plate, the spherical crowning lining plate is slidable in the spherical sliding plate to meet the requirement of the large corner of a bridge, the lower side of the intermediate lining plate is located above the spherical crowning lining late, the upper side of theintermediate lining plate is located below the upper support seat plate, the upper support seat plate is used for being welded with a bridge body, the intermediate lining plate is fixed to a plate spring assembly in a bridge forward direction to ensure that the support seat slides to conduct self-resetting in the bridge forward direction, and the intermediate lining plate is fixed to a guide sliding strip in a cross bridge direction for guiding and constraint. Compared with the prior art, the support seat has the advantages of slip self-resetting, vertical tensile resistance, stable performance, low cost and the like.