[Objective] To study the influencing factors and rules of loess strength under large strain condition in order to provide a theoretical basis for large deformation damages like landslide in loess area.[Methods] Large shear displacement test with ring shear apparatus were conducted to explore the influence of positive stress and shear modes on the residual strength of remolded loess at different water content levels.[Results] The results showed that the greater the effective normal stress, the greater residual strength was, and the smaller the required shear displacement would be. The residual cohesive force fluctuated slightly and the residual internal friction angle decreased with the increase of water content, and a reference formula between residual internal friction angle and water content was fitted. From the perspective of brittle index, strain softening of the remolded loess was not obvious, and the brittleness index decreased with the increase of effective normal stress and water content.[Conclusion] The responses of the peak strength and residual strength to water content and positive stress were similar. Thus the residual strength can be estimated by water content.