The cemented material dam is a new type of dam that has been studied extensively in recent years. This type of dam has many significant advantages such as over-topping， relatively little waste， and ideal environmental protection. At present， there are relatively few research results on the characteristics of dam construction materials and an analysis of dam body structures.This paper combines the weathering material of the Xijiang Dam to conduct a mix ratio test and dam stress-strain analysis. The research results show that when the proportion of strong weathering material in the mixed aggregate is less than 60%， the compressive strength of the cemented sand and gravel can meet the requirements of the preparation； under all working conditions， the overall stress level of the Xijiang Dam is low and uniformly distributed， while meeting The “Technical Guidelines for Cemented Granular Dam Construction” SL678-2014 stipulates that the compressive safety factor is no less than 4. The research results broaden the selection of materials for cemented sand-gravel dams and provide a theoretical basis for the Xijiang Dam Project.