Three-dimensional loading similar material testing system for simulating underground rock and soil disasters

The invention is suitable for similar material simulation tests, and provides a three-dimensional loading similar material test system for simulating underground rock and soil disasters, which comprises a base plate, the surface of the base plate is fixedly connected with a model box; one end surface of the model box is fixedly connected with an end cover plate; servo actuators are arranged on the two sides and the top of the model box and one end, far away from the end cover plate, of the model box in a rectangular array manner; a rectangular pressing plate is arranged at the end part of the servo actuator; a box seat is arranged on the surface of the base plate and at the bottom in the model box; transmission shafts are arranged between the two ends in the box base in a linear array mode. One ends of two adjacent transmission shafts located at the end part of the box seat are in transmission connection through a transmission belt; according to the device, the problems that existing similar material test equ