In order to reveal the shear failure mechanism of graded crushed stone, a smart-rock sensing system was developed in this paper. Combining with the triaxial shear test, the correlation analysis between smart-rock motion characteristic indexes and shear behavior of graded crushed stone was carried out. Based on the shear failure location, the embedded location of smart-rock was selected; the motion characteristics was evaluated by x, y and z axis acceleration and Angle indexes. Results show that the acceleration and angular response of smart-rock are consistent with the three-stage variation of graded crushed stone shear failure. During the process of shear failure, the acceleration response of smart-rock experienced a change from slow motion, accelerated motion to abrupt and stable motion, and the acceleration changes faster in the y and Z directions. The angular response of smart-rock proves that anisotropy of aggregates contacts, and the angular response of x, y and z axes has great difference. The angular response of aggregates is mainly produced in the x and y axes.