The invention discloses a resin composition applied to NMT. The resin composition is composed of the following components in percentages by mass: 90 to 99% of polycarbonate and 1 to 10% of boron tetrafluoride1-methyl-3-ethylimidazole. The invention also discloses a molding method for the above-mentioned resin and metal. The molding method comprises the following steps: cutting an aluminium alloy plate into a size suitable for testing impact strength of tensile strength, then placing the aluminium alloy plate in an NaHCO3-Na2CO3 aqueous solution with a ratio of NaHCO3 to Na2CO3 to be 1: 1 to 1: 3, then carrying out soaking for 10 minutes, and allowing the surface of the aluminium alloy plate to form micropores; and mixing PC resin and an ionic liquid EMIBF4, then carrying out direct injection molding onto the surface of the above-mentioned treated aluminum alloy plate, and allowing the PC resin to smoothly enter the micropores so as to form a firm combination. According to the invention, polycarbonate (PC) is a resin material with excellent impact strength, but the viscosity of PC is high, so PC is extremely difficult to conveniently flow into nanopores in NMT; thus, the resin related to PC in the prior art has no practical application in products; and the addition of the ionic liquid boron tetrafluoride1-methyl-3-ethylimidazole (EMIBF4) into the PC resin can help PC to increase fluidity thereof, so the combination of the resin and the metal is realized.