Agricultural watering device and vegetable greenhouse

The agricultural watering device comprises a supporting frame, a watering assembly and a water supply assembly, the watering assembly comprises a cross beam, a first driving part and a watering part, the cross beam is arranged on the supporting frame in a sliding mode in the direction perpendicular to the length of the cross beam, the first driving part is in transmission connection with the cross beam, and the watering part is in transmission connection with the cross beam. The water spraying piece is arranged on the cross beam in the length direction of the cross beam in a sliding mode, and the water spraying piece can stay at any position on the sliding track of the water spraying piece. The water supply assembly is communicated with the water sprinkling part and the water sprinkling part supplies water, so that the water sprinkling part sprinkles water to irrigate farmland. The supporting frame is erected in the vegetable greenhouse, water is supplied to the water spraying piece through the water supply a