Abstract: This paper investigates the shear strength characteristics of Guilin remolded red clay. It examines the influence of dry density and moisture content on shear strength of saturated and unsaturated remolded red clay with triaxial test. Experimental results show that under the conditions of optimal moisture content and full saturation, the cohesive force and dry density of the remolded red clay have the concave quadratic polynomial fitting curves. The cohesive force and dry density of unsaturated soil have the convex quadratic polynomial fitting curve. The cohesive forces of the saturated and un-saturated clay at the vicinity of dry density of 1.41 g·cm^-3 have the biggest difference. The internal friction angle and the dry density of the remolded red clay have the quadratic polynomial fitting curve of concave shape. The angle of internal friction and the dry density of unsaturated soil have the convex quadratic polynomial fitting curve. Near the dry density of 1.35g·cm^-3, the difference between the internal frictional angles of the saturated and unsaturated remolded red clay has the biggest difference. he water content of unsaturated remolded red clay has significant influence on shear strength parameters.