Abstract: In the event of the reactor accident, the control rod drive mechanism (CRDM) must be able to drop quickly and achieve the safe shutdown. In order to ensure the safety of the reactor, the nuclear power plant puts toward higher requirements on the failure rate of the CRDM. In this paper, the design algorithm of the test scheme for the failure rate of the CRDM and the corresponding solution method based on the dichotomy method were proposed. The correctness was verified by comparison with the scheme given in GB 5080.5-85. It supplements the design algorithm of the fixed-end censored test scheme for success rate verification test scheme of the success or failure type products in GB 5080.5-85. Based on any given success rate, risk value and discrimination ratio, it can give the censored test protocol in a short time. It also designs the success rate verification test scheme for general success or failure type products to meet the increasing reliability requirements for success or failure type products.