Abstract: For the purpose of studying the characteristic of ADS reactor and target coupling validating design method and calculating code, the ADS lead coolant reactor core with fast neutron energy spectrum, more energy increase coefficient and negative temperature coefficient was constructed. The ADS lead coolant reactor core will be used in the experiment study with reactivity effect and the coupling characteristic of neutron source and reactor core, which encloses the different enrichment fuel characteristic and different outside source energy spectrum and intensity. The physics parameters of enclose fuel element construct, target region disposal, reactor core disposal, the reflector construct and importance, safety control, and reactivity importance and so on were confirmed. The study provides the basis for the further development and the experiment study of ADS lead coolant critical assembly.