The invention relates to a tartary buckwheat cultivation greenhouse, and belongs to the technical field of tartary buckwheat planting. The tartary buckwheat cultivation greenhouse comprises a greenhouse body, a power generation device, a spraying device, a rainwater collecting device, a fluorescent lamp, a heater, a water storage pond and a greenhouse door. Wherein the spraying device comprises an irrigation rod, a left slide way, a right slide way, a pulley, a spraying head, a joint and a water inlet pipe; the power generation device comprises a solar electromagnetic panel, a storage battery, an inverter and a controller; the rainwater collecting device comprises a collecting tank, a collecting hopper and a pipeline. The solar electromagnetic panel utilizes solar energy to generate power and supply power to the fluorescent lamp, the heater, the spraying device, the temperature sensor and the humidity sensor, and climate adjustment in the greenhouse is facilitated. The carbon dioxide alarm can monitor the concentration of carbon dioxide in the greenhouse, and measures can be taken in time; the rainwater collecting device can collect and utilize rainwater, the rainwater contains rich nutrient elements, growth of tartary buckwheat is facilitated, meanwhile, accumulation of the rainwater on the greenhouse is reduced, and the service life of the greenhouse is prolonged.