从土壤条件、工程地质条件和水文及水文地质条件3方面，阐述了道路路基稳定性及其影响因素。路基填土稳定性主要依赖土体粘聚力和内摩擦角，而承载力取决于填土含水量和压实度；道路沿线岩石的种类、风化程度和裂隙情况，岩石走向、倾向、倾角、层理和岩层厚度，有无夹层或遇水软化的夹层以及有无断层或其他不良地质现象等，都对路基稳定性有一定的影响；水的渗透不仅产生渗透力对土体造成破坏，更能降低土体的抗剪强度等。这些研究成果对丘陵山区农村道路的路基设计具有重要的理论价值。

 Subgrade is the main body of road. The subgrade bears its own weight and the static load of the pavement, and the kinetic load caused by people, livestock, and vehicle walking on the pavement. This paper reviews the stability of the rural road subgrade and its influencing factors in terms of soil, engineering geological conditions and hydrogeological conditions. The stability of the subgrade filling soil depends largely on the soil cohesion and the internal friction angle, while the bearing capacity mainly rests upon the water content and compactedness. There are so many geological factors influencing the subgrade stability, such as rock types, weathering degree, fractured degree, the rock trend, tendency, dip angle, stratification, and thickness, with or without dissection or water to soften the interlayer, with or without faults or other undesirable phenomena along the road. Not only does the water permeability damage the soil, but also it can reduce the soil shear strength. These conclusions have great theoretical value for the rural road subgrade design in the hilly-mountainous area.