Abstract: The issue of loess intensity has always been a hot topic in the study of geotechnical scholars. The shear strength and loess creep caused by the change of water content are closely related to the stability of loess slope. Through direct shear and creep tests, the effects of water content, dry density and normal pressure on shear strength,and long-term strength of unsaturated Q₂ loess are studied. The results show that compared with the strength of loess with 10% and 18% moisture content under different dry densities, 18% shear strength weakens more than 20% compared with 10%；The increase of water content also has a weakening effect on the viscous force, and there is a more serious tendency to weaken with the increase of dry density；The creep will be caused by the decrease of water content and the increase of dry density； By fitting, it is found that the creep of loess conforms to the law of logarithmic function curve.

Key words: Loess, Peak Shear Strength, Direct Shear Creep, Data Fitting