介绍SZW系列数字温度计的原理结构，并对该仪器的维护维修记录进行整理，分类汇总仪器故障类型，总结该仪器维护的技术重点，提出仪器故障检查判断及常见故障处理方法，并提出仪器稳定运行的环境技术要求，最后给出管理维护注意事项。

This paper introduces the structure and principle of the SZW digital thermometers, and sorts its maintenance records in recent years. The main fault types and technical key points for its maintenance are summarized. Based on these works, related methods for check and judgment, and treatment of frequent failures of the SZW digital thermometers are proposed. The environmental and technical requirements to ensure its stable operation as well as notices for its maintenance and management are also put forward.