Spraying device for potato breeding

A spraying device for potato breeding comprises a main water conveying pipe, a spring, a closing block, a fastening screw, an upper spraying pipe, an upper spraying opening and a middle spraying opening, a water conveying square pipe is arranged in the middle of the main water conveying pipe, a spring connecting table is arranged on the right side of the water conveying square pipe, the interior of the water conveying square pipe is matched with the closing block, and the interior of the water conveying square pipe is connected with the closing block; the right side of the closing block is connected with the spring connecting table through a spring. The top of the closing block is provided with a corner clamping block. The top of the water conveying square pipe is provided with an upper connecting square pipe. The bottom of the upper connecting square pipe is provided with a connecting corner. The left side of the corner clamping block is matched with the connecting corner. The interior of the upper connectin