Abstract: This article introduces three methods of calculation on deep layer stabilization of dam base according to the theory of rigid body limit balance, through the example of dam block No. 16 of Manwan power station, analyses the deep layer stabilization of dam Base of setting alveolus and anchor cable, and uses equal safety coefficient to deduce calculation formula on deep layer stabi1ization of dam base, presents two expression forms including single safety coefficient method and subentry coefficient limit state method, and supplies calculation method of parts of parameters.