<p>One of the main determinants of whether a reactivated landslide will start sliding again is the mechanical characteristics of the soil in the slip zone. Previous studies believe that the residual strength of slip zone soil is a static parameter, but many studies have found that the strength of slip zone soil will produce self-healing phenomenon, which is shown as the increase of shear strength. Based on this phenomenon, this article conducted relevant research. The healing of residual strength of the red-bed sliding zone soil under various normal stresses and consolidation time is studied through the shear-consolidation-shear test on sliding zone soil of the red-bed translational landslide, and the corresponding analysis and discussion are conducted. The findings demonstrate that the red-bed slip zone soil has a self-healing effect; the landslide’s reactivation initiation strength is between its peak strength and residual strength; the red-bed slip zone soil’s strength recovery ratio is proportional to consolidation time and inversely proportional to normal stress; and the consolidation of the slip zone soil of the red-bed translational landslides is the primary factor of the strength healing mechanism, and the mineral characteristics strengthen the mechanism to some extent. In summary, the strength healing mechanism of the red-bed slip zone soil can delay the reoccurrence of the red-bed translational landslides, and this mechanism holds significant importance for the study of red-bed translational landslides.</p>