The utility model discloses an aluminium frame that is used for two glass polycrystalline silicon subassemblies, quench by the different aluminium alloy layer suppression of three -layer composition and form, the supreme third aluminium alloy material layer that stacks gradually under following in the thickness direction, second aluminium alloy material layer and first aluminium alloy material layer, it forms to adopt the different aluminium alloy layer suppression of three -layer composition to quench, the withstand voltage of final formation aluminium frame has been improved, temperature resistant and durability, and make ultimate solar module waterproof, dampproofing class of weatherability can obtain improving, so the service life of the products can be prolonged.