The invention discloses a dam comprising cables, uprights, water baffles, a foundation, anchor rods and an anti-seepage curtain. One ends of the cables are connected to the uprights, and the other ends of the cables are connected to the foundation located in front of the dam; the multiple anchor rods are driven into a surrounding rock mass making contact with the foundation to firmly connect the foundation with the surrounding rock mass; the foundation is in a strip shape in the river direction and has a certain width and length, and the foundation is arranged in front of the dam to provide tension for the cables; the uprights are built in the corresponding positions of the foundation, and the foundation and the uprights are connected by the cables; and each water baffle is arranged between the corresponding two adjacent uprights. The technology of cable-stayed bridges is applied to the dam construction technology, and thus the high and thin dam is provided. According to the dam, the cables are arranged in front of the dam so that the strength of materials can be given to full play. Meanwhile, the dam has the characteristics that the uplift pressure of the bottom of the dam is small, the dam can adapt to various topographical and geological conditions, the concrete consumption of a dam body is reduced, the construction period is shortened, template erecting is easy, the temperature stress is small, and independent action of dam sections is achieved.