Abstract: Toppling failure is one of the most common types of failure in anti-dip stratified rock slopes. The limit equilibrium method based on cantilever beam theory is feasible in the study of the anti-dip stratified rock slopes, which pays attention to deformation process and the mechanics analysis. Based on geological analysis, we present a hypothesis of triangle stress distribution on the top and bottom plane of the beam slab, then derive a formula for calculating the fractured depth in toppling failure of anti-dip stratified rock slopes on the basis of cantilever beam limit equilibrium model. According to a practical project, the calculated fractured depth is close to the result of field investigation, which is further verified by numerical simulation of Discrete Element Method (DEM). The research result has theoretical significance and application value to the stability evaluation and prevention of anti-dip stratified rock slopes.