The invention discloses long glass fiber enhanced polyamide composition. According to the long glass fiber enhanced polyamide composition, a metal salt compound and a long glass fiber impregnating compound are added to conventional long glass fiber modified polyamide, negative ions in the metal salt compound are at least one of hydroxyl ions, carbonate ions, hydrogen sulfate radical ions, saturated fatty acid radical ions and unsaturated fatty acid radical ions, and the long glass fiber impregnating compound is modified hyperbranched polyester with special structures. By means of the metal salt compound, the problems that the melting point of the metal salt compound is high and the metal salt compound is not suitable for being added in the melt processing process or cannot be uniformly dispersed in a matrix due to the fact that halogen ions, nitrate radicals and sulfate radicals are used in conventional metal salt compound can be solved. By means of the long glass fiber impregnating compound containing the special structures, the surface glossiness of a product can be effectively improved, floating fiber can be reduced, meanwhile, under the joint action of the long glass fiber impregnating compound and the metal salt compound, the mechanical and processing properties of the composition can be notably improved, and the composition can obtain appearance and mechanical property which can be obtained only under the high-temperature processing conditions at the relatively lower processing temperature.