A lot of landslides proved that: wreck of rock slope takes place along the joint
its slip surface always is the joint combination and is ladder shape. There are a lot of random joints in rock slope
finding out the slip surface whose shearing strength is minimum is a study direction of slope engineering. Based on investigating and statistics of joint
applying random network stimulation to reappearance space distribution of joints
and applying A* method to find out critical slip surface of rock slope; then separating slope above the critical slip surface slanting
combining with Sarma analysis method
come into being advanced rock slope stability analysis method-Sarma-A* method; and its rationality is validated by engineering instance.