润法是中药材水制法中最基本、最重要、最稳妥的方法，它使药物洁净、软化、便于切制并服务于临床需要。笔者根据十多年的实践、摸索、总结，从因药因时采用合理的润药措施；控制润药时间，确保有效成分不致流失；某些特殊药材的特殊润法及其它注意事项等四个方面论述了润法“贵在适中”的体会 The Run method is the most basic, most important and most reliable method in the Chinese traditional method of making water, which cleans, softens, cuts, and serves clinical needs. Based on more than ten years of practice, exploration, and summarization, the author uses rational drug treatment measures from the cause of drug use; control the time of drug treatment to ensure that the active ingredients are not lost; special treatment methods for certain special medicinal materials and other precautions. Discusses the experience of the “Run in Moderateness”