Abstract: The principle of arranging signal points in railway sections is to ensure the safety of train operation. Based on the problems of complex calculation and tedious design review and review in traditional distribution methods, this paper conducted demand analysis from multiple perspectives such as system hardware, business processes, data, and functions. Based on the results of demand analysis, the paper designed a computer-aided design system for railway section signal layout that could meet the functions of signal layout under different train control conditions, section tracking interval time checking, and drawing of section passing signal.