Real estate project is characterized by long life cycle, huge investment,many participants and complex relationships,so there are lots of undefined risk factors in the performing process.These characteristics determine that the investors will inevitably face many risks in every stage of the whole processes especially in the earlier stage.Therefore taking earlier stage of real estate project as example,this thesis introduces extension engineering method into risk evaluation,and builds risk extension evaluation model.At the end the thesis takes Yishang international project in Handan city as a case to analyze.The results verify that the method is effective to make rapid and rational decision support for developer in earlier stage of real estate project.