Abstract: Based on the analysis foundation of the jointing tension or presses the different condition，used the stress adjustment joint to open，the strain control joint closed criterion separately，had established the double jointing rock slope model which used the ABAQUS software.The rock mass contains two sets of planes of weakness：one vertical set of joints and one set of inclined joints.And the simulation analysis to this jointing rock s slope′s stability has been carried on.Through this method to the jointing rock slope slide process′s simulation，the slope body′s slipping failure plane was obtained intuitively.It proved that the jointing controls the primary factor which the rock slope destroys.It is the important meaning to mderstand slope's destruction which forms mechanism.This criterion can forecast accurately the jointing rock slope latent failure plane′s shape and position，may provide the corresponding theoritical regarding the complex rock slope stability analyses.

Key words: Rock slope, Joint, Stability, Unloading