After the excavation of the cutting slope at DK324 of Huaishaoheng line， a slope slump was formed. Through analyzing the spatial morphology， the composition and structural characteristics of the slope slump， and the hydrogeology of the area based on field exploration， investigations and surveying， in-situ test and laboratory test， the cause and mechanism of the slope slide were clarified. Comparing the differences of stress and deformation among single row piles， double row piles and rigid frame anti-slide piles using finite element method， it was found that the rigid frame anti-slide piles performed the best. And the structure of safe and convenient construction was adopted to treat the slop slump. The long term monitoring results shows that the treatment effect of rigid frame anti-slide piles obviously surpasses others. It is of important guiding significance for slope slump treatment in similar projects.