【摘要】 通过对角平分线投影特性的分析、总结，从理论上证明了角平分线投影特性。毫无疑问，角平分线投影特性与直角投影定理一样，对解决与其相关的画法几何问题不仅简单明了，而且对个别问题有其独特的无法用其它方法替代的效果，文中还给出了该投影特性的具体应用例子。更多还原

【Abstract】 the analysis and summarization, the projection character of angle bisector is proved on theory. It is out of question that the projection character of angle bisector is similar in application to the rectangle projection theorem,it is generally used to solve the problem concerned with it in descriptive geometry, it not only makes some problems easy, but also possesses a particular function not to be replaced by other methods in dealing with the specific problems, at the same time, some specific application examples are given in this paper.更多还原