This text put forward a new thought and method. That is to use DEA method to confirm new degree of coefficient of equipment.

The analysis on models showed that newness coefficient of agricultural machinery, proportion of new and old tractors are two important factors affecting on the intact rate of large medium tractors.

In this paper, a new model of optimizing fuzzy selection for criteria of prize was built, using fuzzy theory and membership grade by specified weight coefficients of different courses.