The utility model discloses a motor -driven hank grinds test bench, including basis of test, the motor -driven hank that lies in on the basis of test grinds, and characterized by flexibly twists to grind and fixes on the hank grinds the support, and the front end that motor -driven hank ground on basis of test is equipped with the portable protection frame that the level was arranged, the front end ground upper end of portable protection frame is equipped with towards a day pulley, install vertical impact main frame on the basis of test who is equipped with court's day pulley one end, be equipped with in the impact main frame and carry latch mechanism and counter weight mechanism. Testing load centre of gravity place is low, and easily the safe operation has alleviateed operating personnel work load, decreasing failure rate, and reading surveyability, with the mutual noninterference of high altitude anti -falling device, it is high to have improved work efficiency, and the multiple safety protection measure in each position has improved experimental security, has guaranteed testing personnel and testing equipment's safety.