According to the experimental research needs of complex electromagnetic environment effect for millimeter wave seeker, a set of non-linear effect investigation platform for Ka-band signal link of millimeter wave seeker is designed and developed. The platform contains mathematical simulation system and experimental test system. Thereinto, the mathematical simulation system is designed based on SystemVue software platform, and the experimental test system is designed based on modularize assembly. The test results show that the platform can be applied to study the effects of complex electromagnetic environment on key signal links of typical millimeter wave seeker.