Abstract: in view of some problems like huge work-load and easy-to-mistaken in evaluation of the land damage degree caused in subsidence area，based on prediction of rock movement， factors，a multi-factor evaluation system is established.The classification criteria of land damage degree are designed.The evaluation method of the land damage degree is proposed based on probability and statistics.The software system for the evaluation of land damage degree for mining subsidence area based on Windows platform is developed.So the evaluation becomes more scientific and reliable，and the work efficiency is significantly increased.

Key words: Mining subsidence, Evaluation of the land damage degree, Indicators system, Classification criteria