Sandwich panel lines are widely applied in the protection and decoration of outside wall for tall building and first-class office building. Sandwich panel production machinery can protect, keep warm and flame retarding. The sandwich panel production line in Guangxing can mainly produce roof panels and wall panels. Manufacturing process: Decoiler transverse location—Lifting stage move outside—coil hoisting—lifting stage move inside (To outside position)—Lifting stage rise (Coil center arrive at the decoiler axle center)—-Lifting stage car move (To inside position)—Decoiler axle expanding (—Pressing-arm press tightly)—-Lifting stage reset position—decoiler uncoiling material