The invention discloses a movable water retaining dam for a water conservancy landscape. The movable water retaining dam comprises a dam foundation, movable dam faces, bottom rotating shafts, foundation embedded fixing seats, hydraulic cylinders, hydraulic pump stations and water retaining height control devices, wherein the foundation embedded fixing seats are mounted on the dam foundation; the bottom rotating shafts are mounted on the foundation embedded fixing seats; the movable dam faces are fixedly connected to the bottom rotating shafts; the movable dam faces can rotate around the bottom rotating shafts; one end of each hydraulic cylinder is movably connected with the back side of one movable dam face, and the other end of each hydraulic cylinder is movably connected with one foundation embedded fixing seat; and the hydraulic cylinders are connected with the hydraulic pump stations which are connected with the water retaining height control devices. The movable water retaining dam is reasonable in structure, firm, reliable and high in flood impact resistance, is not influenced by floating impurities, is not limited by width of a river, is not prone to retain the floating impurities, can be controlled automatically and can be ascended and descended rapidly, the dam can be descended for draining off floodwater without a battery, and flood control safety is realized.