给出了基于遗传规划（ＧＰ）的搜索方法，设计了方向指标，以此为基础定义了函数与自动定义函数集的终结点集与函数集，证明了他们的封闭性．本文还推导了普通图的矩阵表示的遗传规划算子的计算方法，给出了相应的公式，此项工作对在搜索技术中应用遗传规划方法，及使用普通高级语言实现遗传规划方法有重大意义 The method of searching based on genetic programming (GP) is given, and the direction index is designed. Based on this, the terminal set and function set of function and automatically defined function set are defined, and their closure is proved. This paper also deduces the calculation method of the genetic programming operator of the matrix representation of the ordinary graph and gives the corresponding formulas. This work is of great significance for applying the genetic programming method in the search technology and the genetic programming method using ordinary high-level language