本文首先对智能交通灯的研究意义和智能交通灯的研究现状进行了分析，指出了现状交通灯存在的缺点，并提出了改进方法。智能交通灯控制系统通常要实现自动控制。本文还对AT89S51单片机的结构特点和重要引脚功能进行了介绍，同时对智能交通灯控制系统的设计进行了详细的分析。-Firstly, the research of intelligent traffic lights and intelligent traffic lights at the significance of current research analyzes the current situation points out the shortcomings of traffic lights, and the improved method. Intelligent traffic light control system is usually automatic control. This paper also AT89S51 microcontroller pin functions and important structural features were introduced at the same time intelligent traffic light control system for the design of a detailed analysis.