The utility model provides a loading test bench, which is provided with an engine base and a bearing block. Two groups of hydraulic cylinders are hinged between the bearing block and the engine base and take the center of a circle of a bearing mounting hole of the bearing block as a center to be symmetric. Two groups of strip elastic pieces are arranged between the engine base and the bearing block, and the two groups of strip elastic pieces are arranged in parallel and take a plane passing through the bearing mounting hole as a center to be symmetric. As the two groups of strip elastic pieces taking the plane passing through the bearing mounting hole as the center to be symmetric are arranged, when the bearing block rotates, one group of the two groups of strip elastic pieces is pulled to generate tension, the other group of the two groups of strip elastic pieces is pressed to generate pressure, and the tension and the pressure can generate new additional counter torque to the bearing block. The direction of the counter torque is opposite to the direction of the additional torque generated by the own deflection of the bearing block. The strip elastic pieces with appropriate stiffness coefficients are selected to control the size of the counter torque, so that the counter torque and the additional torque can be completely offset, the system of the loading test bench is stable, and the test failure or even major accidents are avoided.