Slope supported by gabion and geotextile bag both have a high supporting strength, and with local materials, convenient construction, adaptability, environmental protection, low noise, low engineering cost and other advantages. So, it has a rapid development and wide application. To achieve supporting and retaining structure of a red beds slope to effectively play the role of protection, convenient construction and reduce project cost. Under the same conditions of indoor model, a comparative analysis of the natural slope model without shoring, model supported by geotextile or gabion is carried out. Obtain a conclusion that the protective effect of the gabion is better, specific suggestions on the suitability and construction of the supporting structure of the gabion are put forward.