首先对苄嘧磺隆和丙草胺复配的20%水分散粒剂(WDG)配方中使用的助剂、填充剂进行选择和优化;按照产品加工工艺所示的方法制得制剂,并对制剂热贮前后的崩解性、润湿分散性悬浮稳定性等各项性能指标进行检测,根据实验结果研制出了性能优良的配方;最后对较佳配方制得的制剂进行热贮稳定性试验.实验结果表明:在悬浮率、乳化性及稳定性等性能指标较好的情况下,崩解时间为60s,符合水分散粒剂的技术指标要求,解决了液体原药固体化、崩解难的问题. Firstly, the auxiliaries and fillers used in the formulation of 20% water dispersible granules (WDG) compounded with bensulfuron and pretilachlor are selected and optimized; the preparation is prepared according to the method shown in the product processing technology, and the Disintegration of the preparation before and after heat storage, wetting dispersion suspension stability and other performance indicators were tested, according to the experimental results developed a good performance formula; Finally, the formulation of the better formulations prepared thermal storage stability test The experimental results show that the disintegration time is 60s in the condition of better performance indexes such as suspension rate, emulsifying property and stability, which conforms to the technical requirements of water dispersible granules and solves the problems of liquid solidification and difficult disintegration problem.