The utilization of dredged soil plays an important role in promoting the harmonious development of society，building energy-saving resources and developing low-carbon economy. The properties of dredged silt in Shiqiao Lock section of the Beijing-Hangzhou Grand Canal are tested and analyzed by large deformation multi-functional geotechnical ring shear instrument，and the influence of restrained axial compressive stress on the strength of curing soil is studied. The test results show that the physical parameters such as bulk density，void ratio，liquid limit，plastic limit，liquid index and plastic index of river silt samples decrease with the increase of silt’s water content. The addition of curing agent can obviously improve the physical parameters of silt soil. The compression modulus，cohesion and internal friction angle of curing silt are significantly affected by the axial confined compressive stress. In practical engineering，it is suggested to increase the axial compressive stress of curing soil to further improve the strength of soil.