Abstract: 【 Objective 】 To explore the luring and monitoring strategy of this aphids in field according to the phototaxis of the adult alatae ofAphis gossypii. 【 Methods 】 The best adaptation time and lighting time ofA. gossypii were selected by using a self-designed insect wavelength selector, and then the selective band ranges of this aphid to 8 spectral bands was evaluated. 【 Results 】 The results showed that the best dark adaptation of cotton aphid adults was 20 min, and the best light time was 15 min. According to these results, 5 spectra with stronger attraction effect on cotton aphid were selected from 8 different wavelengths to enter the next round of experiment by using the method of last elimination, which were 450, 500, 550, 600 and 650 nm, respectively. The last experiment showed that the adult alatae of this aphid had a strong selection tendency for 500 and 550 nm bands, and the attraction rates were 37.28% and 51.56%, respectively, which were significantly higher than others. 【 Conclusion 】 The spectral bands of 500 and 550 nm have the strongest attraction effect onA. gossypii, which is expected to be the alternative spectrum for the trap monitoring ofA. gossypii during the migration period.