Combining the Problem Need to Solve in Braking Course of Descending Belt Conveyor, the paper narrates the self-cooled plate brake about its structure, working principle and function.

By analyzing traditional automobile brake performance tester, the paper pointed out the deficiency. Then, the author designed and applied the dimension dynamic plate brake test system.

According to the reliability design theory and Fuzzy mathematics theory, put forward a Fuzzy reliability design method of working parameter for plate brake and give some application examples.