With science and living standards progress, functional textile products become more and more popular. The natural and no added finishing method is especially pursuited by people. In this paper, we report on the use of extract from cactus to synthesize the silver nanoparticles. The particle sizes about 30nm were prepared under the unpolluted environment. The basic raw material is natural selection, preparation method is simple, non-polluting, eco-friendly and to address the reliability of a better way. Natural fabrics treated with natural plant , not only improve the added value of the product ,but also achieve natural of the fabric, meet the requirements of the modern people. This research product the cactus silver nanoparticles silk fabric, demonstrated that the cactus solution can fix the nano-silver uniform on the surface of the silk fabric. Compare with the result of the physical performance and wearability of this fabric, the mechanical properties of the fabric is decline, but the degree of the decline is not high, the moisturizing properties of the finished silk fabric are increased. The result revealed the tensile properties remained basically unchanged, the smoothness, the even and orderly is decline, the roughness of the surface is increased, the softness is weakened, the bulkiness is reduce, the fullness is weakened, the wrinkle recovery capabilities is improved.