In order to improve cement-soil, a new type cement-soil named rubberized cement soil (RCS) was put forward, which was made by the forced mixing of soft soil, rubber powder, and cement. By means of tests on stress-strain curves and confined compressive strength, effects of cement content, rubber powder content and particle diameter on RCS strength were obtained. Intrinsic mechanics of RCS was further analyzed. Stress-strain curve of RCS developed through three stages, which named elastic stage, elasto-plastic stage and plastic stage. RCS’s peak strain was higher than cement-soil’s. RCS strength increased with cement content, but decreased with rubber powder content. The effect of particle diameter on RCS's strength was related to cement content. Test results indicated that rubber powder could play a role of elastic bodies in cement-soil. Internal cracks would be less and controlled. Therefore plastic deformation performance of cement-soil could be improved and enhanced.
