Aiming at the problem that the mountainous rivers terminal land excavation forms 30 m to 50 m high bedded rock slope reinforcement，according to the lattice anchor and anti-slide pile in the reinforcement design of row spacing，we use the Geo-slope software，establish the high bedded rock slope reinforcement calculation model based on the Morgan Stanley-Plath method，calculate the multiple sets of different row spacing of slope stability safety coefficient under the different working conditions，and select slope reinforcement combination of economic security. The results show that lattice anchor cable anchor and anti-slide pile reinforcement effect on the overall safety factor of slope depends on the size of the supporting structure in the whole slip surface resistance.