The utility model discloses a water-saving crop culture device. Water tank, the top of the water tank communicates with a tank body. An inner cavity of the box body is fixedly connected with a cultureframe; the number of the culture frames is two; the left side of the top of the water tank is fixedly connected with a circulating mechanism; an energy-saving mechanism is fixedly connected to the top of the box body, a filter plate is fixedly connected to the bottom of an inner cavity of the box body, the circulating mechanism comprises a water pump, the bottom of the water pump is fixedly connected with the left side of the top of the water tank, the left side of the water pump communicates with a connecting pipe, and the side, away from the water pump, of the connecting pipe communicates with the left side of the top of the water tank. Through the cooperative use of the water tank, the tank body, the culture frame, the circulating mechanism, the energy-saving mechanism and the filter plate, the problem of poor uniformity of traditional manual watering can be effectively solved, meanwhile, the water-saving and energy-saving effects are achieved, solar energy is used for supplying power, stored water can be recycled, and therefore the water-saving effect is achieved.