The invention relates to a triaxial rheological test process and method for a hard and crisp rock. The method comprises the following steps of: 1, determining an instantaneous triaxial
compressive strength of the hard and crisp rock and loading by adopting a triaxial rheological mode; 2, determining the size of a confining pressure of a test and test loading grades and adopting a loading mode of circularly loading and unloading; 3, sealing a
rock sample by using a heat-shrinkable sleeve and a stainless
steel tube hoop so as to prevent oil from leaking; 4, applying the confining pressure to a set value, applying a first stage of
axial load after the confining pressure is stable, and reasonably setting a time interval of recording data; 5, after the deformation is stable, continuously applying axial stresses in a grading mode until the test is completed; and 6, determining the long-term strength of the rock by adopting a
residual strain method. In the invention, a reasonable value of the confining pressure is provided so as to furthest avoid deformation
mutation caused by local fracture of the rock; the test loading grades are reasonably determined so as to not only obtain a threshold value of the
creep stress of the rock, but also obtain an accelerated
creep curve; and the scheme of determining the long-term strength of the hard and crisp rock by using the
residual strain method of the loading and unloading rheological test is provided.