In 2016, the "one prevention double reduction" project of maize was implemented in Qufu City. Large-scale helicopters were adopted to carry out the specialized control of diseases and insect pests in the middle and latestages of maize. The results showed that control effect of the "one prevention double reduction" technology ofMaize to the late pests and diseases was significant. In the field after the implementation of 10 d, 20 d of controllingby airplane, average corn earworm control effect in project demonstration area were 86.12% and 84.68%, the aver-age control effect of corn leaf spot disease were 75.16% and 73.67%, which was significantly different from conven-tional controlling practice. Maize yield of demonstration area was 8 596.95 kg/hm~2, which increased 639.6 kg/hm~2,and the increase rate was 8.04%.