Abstract: In order to study the mechanical properties of grouting material, triaxial compression tests were conducted by using rock mechanics test equipment RMT-150B. The results indicated that grouting material of different particle sizes differ in intensity and with the increase of confining pressure, the influence of particle size on intensity is smaller. Triaxial compression multi-stage loading creep tests on grouting material samples were conducted and rheological behaviors of grouting material were studied by using rock rheological test equipment RLW-500.