The most factor computations in ILP is the number of integer variables and the feasible range in which they apply. There fore,
in this paper, we propose a revised method of B&B procedure that would reduce the number of
constraints and feasible range in some specific conditions. The numerical demonstrated that our method is more efficient than original B&B most of time. This paper is organized as follows: Section 2 intro- the related concept. Our proposed method will be described in Section 3. The analysis and comparison is presented in Section 4. We summarize this research in Section 5