The invention discloses a preparation technology for a composite plate of a mirror continuous mechanism, and belongs to the technical field of composite plate production. The preparation technology comprises a plurality of glue spreading procedures, a plurality of reinforcing material spreading procedures and a plurality of heating and curing procedures, and the mirror composite plate is obtained;the surface fiber texture of the composite plate is not obvious, and the surface effect is good; and the preparation technology adopts one-step preparation molding, and the quality is stable.