本文报道了水胺硫磷农药在白菜上的残留动态，根据田间试验数据推导出该农药消解过程中的数学模式，该模式表明水胺硫磷在白菜上存在两个速率不同的消解阶段。白菜中水胺硫磷残留量与喷药量和喷后间隔期有密切关系。本研究采用气相色谱法测定水胺硫磷农药残留，方法灵敏度为０．１５ｐｐｍ，添加回收率大于９Ｏ％。 In this paper, the residual kinetics of pesticides on cabbage was reported. Based on the field data, the mathematical model of pesticide digestion was deduced. This model shows that there are two digestion stages of acetochlor on cabbage. The remaining amount of acetochlor in cabbage is closely related to the amount of spraying and the intervals after spraying. In this study, gas chromatographic determination of pesticide residues pesticide, method sensitivity of 0.15ppm, the recovery rate was greater than 9O%.