Rigidity simulator with changeable rigidity

The utility model relates to a rigidity simulator with the changeable rigidity. The rigidity simulator with the changeable rigidity comprises a front end lug seat connection plate, a front rigidity simulating plate, a front fixation plate, a rigidity adjusting block, a guide pin, a fixation block, a rear fixation plate, a rear rigidity simulating plate, a guide sleeve, a large nut, a fixation support, a fixation pin, a support fixation bolt, a micrometric displacement sensor, fixation steel plates and middle fixation plates. The front end lug seat connection plate is arranged at the most front end of the rigidity simulator and the front rigidity simulating plate and the front fixation plate are arranged behind the front end lug seat connection plate. The front rigidity simulating plate, the front fixation plate and the front end lug seat connection plate are fixation through four bolts. The rear fixation plate and the rear rigidity simulating plate are fixed through four bolts. The rigidity adjusting block is