本文介绍了一种利用微波加热一压力浸提、消解技术测定腐植酸类肥料中水溶性腐植酸含量的新方法。并讨论了功率、时间、酸度等因素对测定结果的影响，与标准方法相对照，经ｔ检验法及Ｆ检验法检验，没有明显差异，大大提高了测定速度。该法具有操作简便、省时、省力、经济、不污染环境、也不被环境污染、宜于大批量样品的测定、便于普及推广等优点。为水溶性腐植酸的测定提供了一个快速、准确、简便的分析方法，亦可借鉴于其它样品的分析。 In this paper, a new method for determination of water-soluble humic acid in humic acid fertilizers by microwave heating-pressure extraction and digestion was introduced in this paper. The effects of power, time, acidity and other factors on the determination results were discussed. Compared with the standard method, there was no significant difference between the two methods and the t test and the F test, which greatly improved the measurement speed. The method has the advantages of simple operation, time saving, labor saving, economy, no pollution to the environment and no environmental pollution, which is suitable for the determination of large quantities of samples and is convenient for popularization and popularization. It provides a fast, accurate and simple analytical method for the determination of water-soluble humic acid. It can also draw on the analysis of other samples.