The dam is an important part of the reservoir project,and the safety of the dam has a great impact on the safety of downstream residents.In order to analyze the safety of reservoir dam,Geo-Studio numerical simulation method is used to study the seepage flow of dam and the stability of dam slope.The results show that the seepage flow,hydraulic gradient and dam slope stability of the reservoir dam all meet the requirements of relevant specifications,and the dam stability is good.In the later work,it is necessary to do a good job in dam maintenance,monitoring and early warning,and ensure that early warning can be issued in time when danger occurs.The results can provide guidance for the safe operation of the dam.