Using 40% tobacco atrazine120-150ml/mu, 40% sulfonylurea atrazine 250-300ml/mu, 40% sulfonylurea atrazine 100- 150 can achieve 3-0% after maize seedling. Mu +56% sodium dimethyl tetrachloroacetate 50-60g/ mu, add 35-45kg of water, spray evenly, add 40-50kg of water, and spray evenly on the stems and leaves of corn plants. Prevention and control of maize seedling stage and middle and late stage: spraying glufosinate directionally between rows in the plot with more weeds after 8- 10 leaves (plant height 80cm), but not spraying the liquid medicine on maize plants. The nozzle should be equipped with a "protective cover" to prevent the liquid medicine from spraying on the stems and leaves of corn, and it should be noted that it should not be sprayed when the wind is strong.