There are contradictions between similarity and particularity when simulating the signal and data processing of different radar systems. Based on the component design, radar signal and data processing are divided into 28 components including antenna simulation, target echo power calculation, pulse compression, parameter measurement, trajectory start, tracking filter, scheduling strategy and so on. By choosing the parameter of radar type, the particularity radar function can be simulated. Meanwhile, the components of similarity radar function are reusable so that the phased array radar, mechanical scanning radar and passive radar are simulated in functional level. The components are tested to verify the effectiveness of the component design method.