Reinforced geotextile is compositely knitted by highly strong fiber strands and nonwoven fabrics, whose technology is that fiber strands are flatly and straight ranked, which can fully develop yarns load functions. Pad nonwoven fabrics under the fiber strands; wrap and pack them with warp-knitting technology so that the fiber strands and nonwoven fabrics are firmly combined together, which not only can keep nonwoven fabrics anti-filter ability but also will have woven fabrics intensity. For anti-filter, it will have a good function of keeping soil and fast water permeating; for isolation, it can keep each soils integrity; for intensity, it will be used as pull component in the soil to prevent them from dispersive displacement because it will cause large friction between it and soil. Therefore, reinforced geotextile can be widely used in soil engineering instead of geotextile, like dams slope protection, highways, airport, rail base reinforced isolation, and dams embankment retaining underwater , i.e. soft bottom discharge.