Combined clamp for rock test

The invention provides a combined clamp for rock testing, and relates to the field of rock mechanical property testing, the combined clamp comprises a base, a movable support, a conical support, a side clamping plate, a first supporting roller, a Brazilian splitting pressure head and a three-point bending pressure head, the base is provided with a first groove and a second groove, the movable support is connected with the base through the first groove, and the conical support is connected with the three-point bending pressure head through the second groove. The conical support is connected with the base through a second groove, the lower end of the side clamping plate is fixedly connected with the upper end of the movable support, a V-shaped groove is formed in the upper end of the side clamping plate, the first supporting roller is placed on the V-shaped groove and connected with the side clamping plate through a connecting piece, and the three-point bending pressure head presses a sample placed on the first