Abstract: The research of the stability of high fill cohesive soil slope was more in the past. In order to study high fill coarse grained soil slope which is different from cohesive soil on the deformation and strength, using software ABAQUS, the multilevel rein forced soil slope was finite element numerical simulated with strength reduction theory and the stability of the whole slope was analyzed The results show that, the reinforced not only improves local stability of each step, but also strengthens the integral stability of slope; the slope has horizontal displacement. The maximum value appears in the slope bottom near the slope toe. And a part of negative displacement appears along the positive X axis; horizontal displacement reduces with the filling height increasing. The largest horizontal displacement is in the first step; closer to the slope, the geogrid and soil displacement are bigger. The trend of becoming large is approximate alignment. But the soil horizontal displacement is significantly greater than the geogrid horizontal displacement.