Geothermal greenhouse

The utility model belongs to the technical field of greenhouses, especially relates to a greenhouse in which heat of underground water is used for retaining heat, and particularly relates to a geothermal greenhouse. The geothermal greenhouse comprises a sealed greenhouse body of the greenhouse. A composite frame structure is adopted in the sealed greenhouse body. One side wall body of the greenhouse is a water curtain cooling wall which comprises a wall base and a geothermal water curtain radiator. A wall body opposite to the water curtain cooling wall is a fan wall which is provided with a plurality of fans side by side. A floor heating system which is provided with radiating tubes is adopted on the ground of the greenhouse. The geothermal greenhouse fully combines and uses underground water temperature, has high heat transfer efficiency, achieves green and pollution-free heating, and has good environmental protection effect.