The invention discloses a rock relaxation test mechanism, which includes a loading oil cylinder, a loading shell, a loading shaft, a cover plate assembly, and a lifting assembly. A loading cavity is formed in the loading shell. The loading shaft passes through the loading shell and enters the loading cavity. A rock sample is mounted in the loading cavity. A clamping screw is arranged on an opening end surface of the loading shell and is mounted in a clamping hole in the cover plate assembly so as to mounting the cover plate assembly with the loading shell. The invention also discloses a relaxation-disturbance comprehensive test apparatus using the rock relaxation test mechanism. The test apparatus can be used for carrying out the relaxation-disturbance comprehensive test, can restore the actual forced status of the sample underground relatively actually, and can supply effective reference for design and construction in later period.