Software radar is the application of software defined radio in radar domain. With performance improvement of electronic instrument, hardware platfor's performance will not restrict the development of software radar any more, and it means software radar developing based on software engineering becomes more and more important, and it can accelerate development of software system of radar. However,the research of software radar halt on the realization of hardware platform now, and the research of utility of advanced software engineering technology to improve developing efficiency and reliability is few. The significance of software engineering theoretic applied in radar system developing was summarized, and software product line technology was introduced to the software developing. Domain engineer modeling of software radar was done, and domain analysis model as well as domain software architecture were generated which would be used in domain design process. Software radar developing with software product line could make full reuse of system's developing process, requirement analysis, SA, domain components, etc. which could improve developing efficiency and software quality effectively.
