Geotextile provides functions of reinforcement, filtration, drainage, isolation permeability proofing and protection. Based on the main features, configuration, structure character, hazard, genetic mechanism and stability of Wushan former city area landslide, the parameters of engineering geology, which correlate with the geotextile, are introduced. The landslide was reinforced with the geotextile in Wushan former city area landslide.