Abstract: The magnetic component is extensive in the aerospace,also is key function in the power system. Base on the failure data of magnetic component for space application from the USA,the main failure reason of the magnetic component was analyzed. The failure data of the magnetic component in domestic aerospace was censused and analyzed. By comparing the failures occurred in the design,production and using of magnetic component from China and the USA,the main failure reason of these components were identified。For ensuring the quality and reliability of magnetic component,reference to an MILSTD and GJB,the magnetic component of domestic aerospace screening test was suggested.