Abstract For the issues of the low degree of approximation and incomplete elements of the test electromagnetic environment construction in the anti-jamming infield test of radar guided weapons, based on the analysis of the complex electromagnetic environment and the characterization surface test electromagnetic environment faced by radar guided weapons, the equivalent construction method of the dynamic test electromagnetic environment based on the characte-rization surface was presented. It focused on the dynamic test electromagnetic environment equivalent construction from three dimensions: combat scene mapping, combat technology equivalence and confrontation tactical control. It used the infield hardware-in-the-loop simulation platform to analyze the specific implementation method and the confrontation intensity index of the test electromagnetic environment was analyzed from the level of confrontation intensity. The method can provide the method support and theoretical basis for the test electromagnetic environment construction of anti-jamming test of radar guided weapons.