Abstract: A damper with hidden rail, comprising a shell and a damper, the damper comprises a tension piece, a sliding block, a telescopic cylinder and a limiting piece, the sliding block is slidably mounted in the shell, and the tension piece is connected to the shell and the sliding block; the tension piece is capable of pulling the sliding block to move; the limiting piece is connected to the sliding block, and the telescopic cylinder is mounted on the shell; the limiting piece is provided with a compression surface, one end of telescopic cylinder abuts against the compression surface directly or indirectly, and the telescopic cylinder and the limiting piece have a first relative position and a second relative position; in the process that the tension piece pulls the sliding block, the telescopic cylinder moves; and in the process that the telescopic cylinder moves, the telescopic cylinder is gradually compressed.