根据STC10F04单片机的特点及交通灯在实际控制中的特点，本文提出一种用单片机自动控制交通灯及时间显示的方法。同时给出了软硬件设计方法，设计过程包括硬件电路设计和程序设计两大步骤，对在单片机应用中可能遇到的重要设计问题都有涉足。本文对十字路口状态预设为三种，一种是正常状态，一种是紧急状态，另一种是方程式状态。增设路段遇忙调整时方程式控制状态和紧急情况处理模块，通过手动控制开关按钮A0和A1方便系统在正常状态和紧急状态、方程式控制间来回切换，进一步完善了交通灯控制-According to the characteristics of the STC10F04 microcontroller and traffic lights in the actual control characteristics, the paper proposes a with microcontroller automatic control traffic lights and time display. At the same time gives the hardware and software design methods, design process includes two steps of the hardware circuit design and program design of the important design issues that may be encountered in SCM applications have to get involved. Crossroads state preset to three, one is a normal state, a state of emergency, another equation state. State of emergency processing module, additional sections Busy adjustment equation control by manual control switch button A0 and A1 convenient system to switch back and forth between the normal state and a state of emergency, equation control, further improve the traffic lights control