The invention relates to a functional nylon 66 shell fabric and a manufacturing method thereof. The method is characterized by comprising the steps of 1, raw material selection and distribution, 2, spinning technology, 3, weaving technology and 4, finishing technology after dyeing. The shell fabric has the advantages of being high in yarn fine denier and large in tightness, and being firm in texture, high in tear resistance and good in wear resistance even though tissue is simple plain weaves. The shell fabric can be used for manufacturing a jacket and a wind coat and can also be used for manufacturing sportswear and leisure wear when used as the high-density nylon fabric shell fabric, and the shell fabric is a best-quality shell fabric of a down jacket in the current trend that winter clothing is portable due to the fact that the warp and weft density is higher; the shell fabric is super strong, capable of resisting gigging and resisting coldness, warm, light, soft, fine, smooth, easy to wash, quick to dry, easy to manage and not likely to fade when used as the down jacket shell fabric; energy losses are reduced through light reflection, the warmth keeping effect is achieved, and cells are activated through resonance and generation of heat by friction, so that the health care effect is achieved.