Double-layer spraying system for scaffolding crops

The invention relates to the technical field of fertilization, in particular to a double-layer spraying system for scaffolding crops. The double-layer spraying system for the scaffolding crops comprises a connector, a liquid guide pipe, a spraying device and an extension pipe, wherein the connector is used for communicating an external water supply device with the liquid guide pipe; the spraying device is communicated with one end, opposite to the connector, of the liquid guide pipe; the spraying device comprises a thread sleeve on the top, a lock nut, a sliding sleeve, a fixed sleeve, pull rods, sprayers and an inner bush for fixing the liquid guide pipe; the sprayer is located at one end of the fixed sleeve and hinged to the fixed sleeve; the pull rod is arranged between the sliding sleeve and the upper wall of one side, far away from the fixed sleeve, of each sprayer; the pull rods are located on the sprayers and at two ends of the sliding sleeve and hinged with the sprayers and thesliding sleeve respectiv