Abstract: Glass fiber reinforced polymer composites(GFRP) has high strength, good heat resistance and strong resistance to alkaline corrosion, and has been widely used in the field of civil engineering. In order to study the interfacial friction characteristics between the silty soil in the Yellow River flooding area and GFRP cloth, the direct shear friction test was carried out by using TZY-1 geosynthetic material comprehensive tester, and the effects of moisture content, compactness, normal stress on the interface friction characteristics were analyzed. The results show that the interfacial frictional strength of silty soil and GFRP cloth increases with the increase of compaction degree; the interfacial friction strength reaches the maximum when the soil moisture content is the optimal moisture content, and decreases when it exceeds the optimal moisture content; the interfacial shear resistance increases with the increase of normal stress, and the friction coefficient decreases with the increase of normal stress.