Provided is a complete machine for spraying and continuously feeding a roller shaft used for a prepreg gluing machine. The machine comprises a feeding mobile frame (71), wherein the feeding mobile frame (71) can move along an X shaft and a Y shaft, and mounting disc mechanisms are arranged on the feeding mobile frame side by side. The machine further comprises a spraying mechanism, and each of the mounting disc mechanisms feeds a roller shaft into the spraying mechanism for spraying. The complete machine for spraying a roller shaft adopts automated control, therefore achieving a highly effective and novel roller shaft manufacturing mode, a high rate of finished products, and a good effect.