The paper analyzes the algorithm of building linear buffer zone by angular bisectrix method,then puts forward a new method for getting angular bisectrix and buffer point.

• 分析了用对角平分线法建立缓冲区的算法,提出了一种新的求角平分线和缓冲点的方法,实践证明其在算法实现方面是可行的,而且效果比较理想。