DS18B20是一种可组网的高精度数字式温度传感器，由于其具有单总线的独特优点，可以使用户轻松地组建起传感器网络，并可使多点温度测量电路变得简单、可靠。本文结合实际使用经验，介绍了DS18B20数字温度传感器在单片机下的硬件连接及软件编程，并给出了软件流程图。-DS18B20 is a network of high precision can be digital temperature sensor, because of its unique advantages of a single bus can enable users to easily set up from the sensor network, and enable multi-point temperature measurement circuit becomes simple and reliable. Combining practical experience with digital temperature sensor DS18B20 introduced under the MCU hardware connection and software programming, and gives the software flow chart.