Abstract: The application of high density electric methods in the anti-seepage walls is studied with comparison.Based on the results in engineering, we compared the two high density electric methods that has 3 poles profile and 4 poles profile respectively.The results show that, for the anti-seepage walls that accord with detecting condition, we can get satisfied results in the detection with 3 poles profile method.As the method is fast, cheap, sensitive and easy to perform, it has great prospect in use.