Multi-function fracture rock mass pressure shear test device

The present invention discloses a multi-function fracture rock mass pressure shear test device which includes a body frame, a specimen fixing seat for fixing a to-be-tested specimen is arranged below the body frame, a normal direction loading device is arranged just above the specimen fixing seat, the normal direction loading device is connected with the top of the body frame; one side of the body frame is provided with an inclined shear loading device for applying an inclined load to the to-be-tested specimen; the normal direction loading device and the inclined shear loading device are controlled by a control system, and are respectively used for applying a normal direction load and the inclined load to the to-be-tested specimen, the normal direction load and the inclined load intersect in a predetermined shear plane of the to-be-tested specimen, and a preset fracture is arranged in the predetermined shear plane; an antiattrition device is arranged between the upper surface of the to-be-tested specimen and the normal direction loading device; first the normal direction loading device is started, when the normal stress reaches a predetermined value, the inclined load is gradually increased oblique load, at the same time, the loading value of the normal direction load is correspondingly reduced, so that the normal stress is always equal to the predetermined value, and the shearing force increases constantly until the to-be-tested specimen is destroyed.