Abstract: To carry out scientific cultivation and management of cowpea by applying insect-proof nets, we observed the growth characteristics, quality and yield of cowpea under the cultivation modes of 80 mesh closed and semi-closed insect-proof nets. The results showed that: compared with open field cultivation, the vine sprouting period and pod period of cowpea under the cultivation mode of insect-proof nets were ahead of time, the harvest period was extended and the yield was significantly increased. Under the cultivation mode of semiclosed insect-proof net, the vine sprouting period and the pod period were ahead of time by 2 days and 4 days, respectively, the harvesting period was extended by 7 days and the yield was increased by 56.47%. Under the cultivation mode of closed insect-proof net, the vine sprouting period and the pod period were ahead of time by 3 days and 4 days, respectively, the harvesting period was extended by 14 days and the yield was increased by 50.86%. During the same period, the plant height, stem diameter, internode length, leaf length and leaf width of cowpea under the cultivation mode of semi-closed and closed insect-proof nets were better than those in open field. Compared with the closed insect-proof nets, the chlorophyll index of cowpea under the semi-closed insect-proof nets was significantly increased. Therefore, 80 mesh semi-closed insect-proof net is suitable for cowpea cultivation