Abstract: On the basis of improved method of Sarma, studies the method of stability evaluation of any slide surface and different dank slope, and develops system of slope stability analysis and evaluation, the system considers application of ground water, seism, additional load on slope or consolidate force. It has many functions in many conditions, such as calculation of stability coefficient, sensitive analysis, reliable analysis, the best consolidate angle and consolidate force. This method has been a compositive and accurate method of evaluation through application and optimization in many engineering examples, and is proved to be effective and reliable.