Spraying device for automobile part machining

The spraying device for automobile part machining comprises a box body, vertical plates are fixedly arranged on the inner walls of the two sides of the box body, storage shells are slidably arranged on the adjacent sides of the vertical plates, and a plurality of nozzles are fixedly arranged on the sides, away from the adjacent vertical plates, of the storage shells in an array mode; first air cylinders are symmetrically and fixedly arranged on the inner wall of the top end of the box body, the output ends of the first air cylinders are fixedly connected with a first support, a first containing groove is formed in the first support, and a first motor is fixedly arranged on the inner wall of the top end of the first containing groove. The output end of the first motor penetrates through the bottom end of the first support, extends to the position below the first support and is fixedly connected with a first clamping plate, second air cylinders are symmetrically and fixedly arranged on the inner wall of the bot