Abstract: In order to discuss the destructive rule in Donghai deep tunnel and offer technique sustain to it. In this paper, the destructive form in this mine was analyzed, the main factors influences wall rock were found. Conclusion was drawn. Only the wall rock character of tunnel wall rock stress and supporting manner reach the optimal combination, the objective that supports the deep tunnel would realize. Under the wall rock stress was defined only change the wall rock character and investigate the rational optimal support way the problem of support in deep tunnel would be settled.