Root system accurate watering device for dry land commercial crop planting

A precise root system watering device for dry land commercial crop planting at least comprises two fixed blocks symmetrical in position, a movable block, a water tank and a spray head, a lead screw is fixed between the two fixed blocks, a gear motor is fixed to the end of the lead screw, the lead screw is provided with the movable block capable of linearly moving along the lead screw, the water tank is fixed to the movable block, and the spray head is fixed to the water tank. One side of the water tank is connected with a water pump through a pipeline, and the output end of the water pump is connected with a nozzle through a pipeline. And a screw rod is arranged in the fixing block in a penetrating mode, an inserting rod is fixed to the bottom end of the screw rod, and a rotating disc is fixed to the top of the screw rod. The water tank is driven by the lead screw moving block to move stably, so that the water tank can be used for efficiently and stably irrigating commercial crops in the dry land. The waterin