Abstract: 【Objective】 Bemisia tabaci is an important pest on cotton and other crops. Once the outbreak occurs, the loss of cotton yield and quality is extremely serious. 【Method】 According to the field investigation and analysis of the tropism of B. tabaci to cotton and A. theophrasti, this article uses cotton, Abutilon theophrasti, and castor oil plant as materials to investigate the selectivity of the insect to the above three host plants in an indoor cage. 【Result】 The results showed that the adult population of B. tabaci in cotton fields reached the peak in mid-August in 2019, and the nymphs reached the peak in late August. In mid-August, the number of adult on the upper, middle, and lower three leaves of A. theophrasti reached 90.5 adults/plant, 30.9 adults/plant on cotton field. In late August, the number of nymphs on A. theophrasti reached 31.7 nymphs/plant, and 14.1 nymphs/plant oncotton. B. tabaci in cotton fields has obvious tropism to A. theophrasti, and the amount of B. tabaci on abutilon was always significantly different from that on cotton. And in early and mid-August, B. tabaci on cotton plants close to A. theophrasti has a tendency to move to A. theophrasti. After late August, the amount of B. tabaci on the cotton near the A. theophrasti was also more than that on the cotton far away from the A. theophrasti. Indoor cage experiments showed that 60.6% of B. tabaci chose A. theophrasti, only 27.0% on cotton and only 12.4% on castor oil plant. 【Conclusion】 Moreover, there were significant differences in the amount of B. tabaci on A. theophrasti, cotton and castor oil plant. This provides an important reference for the use of “push-pull” technology to prevent and control B. tabaci.