Abstract: The dam reinforcement technology occupies a vital position in the construction of water conservancy projects in my country. With the continuous increase in the use time of dams,most of the early-built water conservancy projects have experienced varying degrees of aging. Especially for small and medium-sized reservoir earth-rock dam projects,most of them have the phenomenon of seismic liquefaction of sand layer under the action of earthquake. In order to ensure the quality of water conservancy projects, it is extremely important to adopt the method of removing danger and strengthening. In this paper,combined with the danger elimination and reinforcement project of a small and medium-sized reservoir dam, this paper proposes an earth-rock dam rip-rock squeezing and silting reinforcement plan. It is hoped that this economic and reasonable dredging method will further improve the quality of water conservancy projects.