Spraying device for pickling and using method thereof

The invention discloses a spraying device for pickling and a using method thereof. The spraying device comprises a spraying box. A transverse plate is fixedly connected to one side of the bottom of the spraying box. A water pump is fixedly installed at the top of the transverse plate, the input end of the water pump extends into the spraying box, and the output end of the water pump is fixedly connected with a connecting hose. A top plate is fixedly connected to the top of the spraying box, and a sliding groove is formed in the end, close to the water pump, of the top of the top plate. The spraying device is compact in structure, easy and convenient to operate and high in practicability. A flow guide plate driven by a driving mechanism is arranged in the spraying box, so that left-right reciprocating motion spraying can be conducted. Meanwhile, a rotating assembly is arranged and can drive the flow guide plate to rotate when the flow guide plate reciprocates left and right, so that it is guaranteed that the e