Stable excavating method for cracked weak rock road cutting high slope

The present invention discloses process of excavating high road cutting slope of broken soft rock in railway and highway engineering. The excavation process features dividing the road cutting into several upper and lower excavation layers, excavating one layer by one layer from the top to the bottom, performing slope protection to each excavated layer, and pre-reinforcing the slope in the layer to be excavated. The excavation process of the present invention including the technological measures of stepped excavation, stepped stabilizing and pre-reinforcing can avoid erosion and weathering in the slope and stabilize the excavated slope.