The invention discloses at least one layer of plastic film and at least one layer of aluminum foil bonded by an adhesive to form an even-numbered multi-level compound, and finally coated with heat-sealing glue, which can be punched and formed into a high-seal tropical-type plastic-aluminum composite hard sheet and In the production process, the plastic film layer is a plastic film densely covered with tiny corona spots through double-sided corona shock treatment, and the aluminum foil is an aluminum alloy aluminum foil containing silicon element and is single-sided light. The multi-layer composite structure with plastic-aluminum toughness and brittle complementary matching of the present invention slows down the lattice slip deformation and damage during the stamping and stretching of the aluminum foil, so that the plasticity can reach consistent synchronous forming. Through the double-sided corona impact on the surface of the polyester film layer, a strong electrostatic attraction and surface adhesion are formed, and the plastic-aluminum composite is uniform and compact, which fundamentally solves the problem of sealing the composite hard sheet for sealing the drug cover in the plate Poor compactness, poor fastness, easy to foam, not resistant to peeling, easy to deform, soft and not firm, insufficient depth of stamping concave, unsightly, and unsatisfactory sealing.