Abstract: At the present time,single method as one of the methods used in calculation of hydrogeology parameters can give good results. But this method has a weakness which the single model can retrograde easily during computing procedure,which makes the computing can not continue. However, complex can avoid such result to some extent. So it is used more and more in many field.
Complex method was used in this article to compute the hydrogeology parameters in one coal field where has been threatened by great amount of karst water,while the advantages and disadvantages were discussed. Conclusions prove to be that this method has good stability,converges rapidly and can give high precise solution. So we can save much time if we use complex method. In our practice,the parameters obtained with this method can present the hydrogeology conditions in the researching area.