Abstract: The biggest safety problem of cowpea production is chemical pesticide residue by treating thrips, cowpea pod borer and other pests. In order to explore safe and efficient mode of cowpea production which is fit for climate characteristics of Hainan, ensure the safety of cowpea supply and minimize the use of pesticides by using insect nets in cowpea cultivation, we set 5 mm2, 2.5 mm2 and 1.67 mm2 pore of insect nets cultivation as three treatments and none as control in terms of contrast in effect of anti-insect, biological character, fruit commodity and yield production. The results show that 2.5 mm2 pore of insect nets of cultivation is the best