25% benzuofucaotong and atrazine dispersant oil suspension is a maize field herbicide. The efficacy test results showed that the spraying dose of 937.5～1 125.0 g a.i./ha in the 3～5 leaf stage of maize had a control effect of over 99.4% on weeds. In particular, it had ideal control effect on maize malignant and resistant weeds, was safe tomaize, and increased yield obviously compared with conventional weeding.