Developed PP/PS sheet production line, used for the production of multi-layer composite environmental sheet, the material is mainly used for blister molding of all kinds of food containers and packaging, such as: tray, noodle bowl, lunch box, cake box, fruit plate, etc. The equipment can effectively use the proportion of stone powder, not only reduce the raw material cost of sheet material, but also improve the degradability of sheet material and ensure the comprehensive physical properties and subsequent processability of sheet material.