Numerical simulation to the movement of landslides in the post-failure stage is crucial for determining kinematic parameters and assessing the impacted scope and intensity. The residual strength of the sliding surface soil fundamentally governs the kinematic characteristics of landslides in post-failure stage. However, current numerical simulations rarely consider the complex variability of residual strength during landslide movement, for instance, the shear rare-dependency. A shallow landslide on the residual soil slope named Fanzhangzu landslide in southern Anhui was taken as a case study. The soil samples taken from the sliding surface were tested to determine their basic physical and mechanical properties. Rate-stepped ring shear tests were then conducted to reveal the rate-dependency of the residual strength. On this basis, rate-dependent residual strength of sliding surface soil was considered to simulate the movement process of the Fanzhangzu landslide by using PFC^2D. The results show that the residual strength of the sliding surface soil shows significant rate-strengthening at the landslide stress level in field-scale. This law demonstrates that the Fanzhangzu landslide will not exhibit high-speed movement after initiation. the movement duration after initiation of the Fanzhangzu landslide is approximately 78.7 s. Throughout the movement process, the landslide exhibits distinct zoning characteristics in its movement pattern. The velocity along the sliding surface demonstrates oscillatory features, final deposition state is basically consistent with the on-site investigation. The research results can provide valuable references for the disaster prevention, mitigation, and risk assessment of residual soil landslides in mountainous area in southern Anhui.