Irrigation device for agricultural greenhouse

The utility model discloses an irrigation device for an agricultural greenhouse, which comprises a fertilizer injection device, a water pump and a water storage tank, the fertilizer injection device comprises a Venturi fertilizer injector and a fertilizer storage tank, the Venturi fertilizer injector is arranged between a water outlet pipe of the water pump and a water supply pipeline connected with a spray head, the Venturi fertilizer injector is connected with the fertilizer storage tank through a pipeline, and the water supply pipeline is connected with the spray head. The filtering devicecomprises a filtering net box and a limiting seat, the filtering device is arranged in the water storage box, and the water storage box is connected with a water inlet pipe of the water pump. According to the irrigation device for the agricultural greenhouse, irrigation water can be filtered through the filtering device, the filtering net box can be detached and cleaned, the situation that a sprayhead is blocked after lon