Abstract: Fenoxaprop-P-ethyl EW is efficient to prevent and kill the Will oats. The suitable dosage is 750~900ml,mixed with 225kg water per hm2 .It can be spray average when 4~5 leaf stage on the wheat and 3~4 leaf stage on wild oats. Not only the effect can reach more than 85%, but also it is safety to wheat and the output can reach more than 20% after killing wild oats. The result of research indicates that fenoxaprop~P-ethyl EW is efficient, low poison and safety to kill the wild oats, it can be widely used.