The homo economicus hypothesis has been put forward by Adam Smith for only over a hundred years, but its academic and social impact is quite striking. However, in recent years, there have been a number of voices questioning the homo economicus hypothesis and its accuracy as a cornerstone of modern economics. The extended service model, as an important component of defense manpower economics, is developed in the analysis of extended service experience, which needs to systematically explain the current and future salary requirements. On the one hand, this paper reflects on the criticism of the homo economicus hypothesis, puts forward improvement Suggestions and expectations, and give definition to the hypothesis of 'new homo economicus hypothesis'. On the other hand, it will focus on the new homo economicus hypothesis and take its influence on the model of extended service into consideration.