In order to test an EW system intrapulse features analysis capability, we need construct realistic radar intrapulse feature signal environment. This paper aimed at the modeling and the validation of intrapulse features signal environment simulation, based on “FPGA+DA”construct the modeling plat of intrapulse feature , use mixed domain oscilloscopes as a core component , construct a kind of radar intrapulse features simulation and validation system. This paper described the design idea, system composing, working flow, key technique. The system can verify fidelity of simulant intrapulse feature signal environment.