The invention relates to a greenhouse with a water storing function, and belongs to the technical field of greenhouses. The greenhouse comprises a floor, a wall is arranged around the floor, the wallis provided with a door, a greenhouse roof is arranged at the top of the wall, so that a closed greenhouse space is formed; and the wall includes an outer earth wall and an inner earth wall, a thermalinsulation layer fills the space between the outer earth wall and the inner earth wall, a partition wall that divides the greenhouse into left and right parts is arranged in the greenhouse space, solar photoelectric converters are arranged on the greenhouse roof, illumination lamps are installed in the greenhouse spaces of the left and right sides of the partition wall, the solar photoelectric converters are connected with a storage battery, the illumination lamps are electrically connected with the storage battery, and a water storing tank is arranged at the bottom of the floor. According tothe greenhouse provided by the invention, the wall adopts a three-layer structure, and compared with the prior art, the greenhouse provided by the invention realizes low-cost research and low-cost greenhouse planting technology.