The invention relates to a slide rail component used on a stand, comprising a first rail member, a second rail member, a first bracket, a clamping member, an operation member and an elastic member. The second rail member is glidingly connected to the first rail member, one end of the second rail member comprises a basal part, and most of the basal part is perpendicular to the second rail member; the first bracket is fixedly connected with the first rail member and comprises a supporting member which corresponds to the basal part and comprises an opening; the clamping member is pivoted on the basal part and comprises a clamping part which is provided with a clamping surface; the operation member is connected to the clamping member and can be operated to drive the clamping member to move; and the elastic member acts on the clamping member. The first bracket is mounted on the stand, and the clamping part of the clamping member can penetrate through the opening of the first bracket so that the clamping surface of the clamping member can abut on the wall at the periphery of the stand for fixation.