The large-tonnage prestressed anchorage system for the safety shell of nuclear power plants is an important and complex part of the construction of the safety shell. The static anchoring performance of the anchorage is measured through static load tests of the steel strand anchorage assembly. According to the requirements of the nuclear power design unit, the actual working conditions should be simulated during the static load test of the prestressed anchor of the nuclear safety shell, and concrete anchor blocks should be added at the ends. Compared with the conventional anchor static load test, the steel wire strands bend at the concrete anchor blocks, which greatly increases the difficulty of the test. This article introduces the static load test of prestressed anchors for nuclear safety shells under simulated actual working conditions. The success of the test has led to the application of domestically produced prestressed anchors for nuclear power plants