Abstract: According to specificities for jointed rock mass,multiple sliding failure of a jointed rock mass is presented,due to accumulation of stress along bedded plane of rock mass and destruction of remnant intact rock bridges between bedded planes and joints.And Rock Triaxial Serve Testing System is used,through model test involving bedded planes and a set of joint normal to the bedded planes in rock mass,multiple sliding failure affected by properties of joints and confining pressure is analysed,the condition triggering multiple sliding failure and characteristics of failure plane are given,under the co-action of inclination of connective joints(bedded planes),interlocking conditions of critical joints and confining pressure.At last,data is compared with previous work,and on the basis of it reliable results are given,and the results would be useful for assessing probable modes of failure of a jointed rock mass for future practice.