本文提出了用GC-ECD测定麦田土壤、植株、麦粒中残留禾草灵的方法。禾草灵残留量用外标法根据峰面积定量。土壤、干麦叶、鲜麦叶和麦粒中的最低检测浓度分别为:0.015ppm、0.029ppm、0.036ppm和0.015ppm。不同样品在0.029—0.087ppm间分别以三个不同浓度标准溶液添加后,全过程回收率试验在75.1％—97.2％之间。 This paper presents a method for the determination of residual grassgrass in wheat field soil, plant and kernel by GC-ECD. Grampus residue with external standard method according to the peak area of ​​quantitative. The minimum detectable concentrations in soil, dry malt, fresh wheat leaves and kernels were 0.015 ppm, 0.029 ppm, 0.036 ppm and 0.015 ppm, respectively. Different samples were added in three different concentrations of standard solutions between 0.029-0.087ppm, the whole process recovery test was between 75.1% -97.2%.