Abstract: The important load-bearing components in the Integrated Head Package (IHP) system are mainly the lifting tripods. According to the requirement of design document, each component of lifting tripod should be tested by magnetic particle after machining and loading test. Because there are many special-shaped parts, it is necessary to analyze each part to work out reasonable magnetic particle testing technology and select related testing equipment. In this paper, according to the standard test requirements, through parameter calculation and related test, the test process specifications in line with the test standards are worked out. The process code has been applied to the construction practice to provide quality assurance for the localization of the third generation nuclear power.