Abstract: The paper aims to make a set of suitable technical regulations for controlling Myzus persicae in tobacco planting areas in Hanzhong, Shaanxi, we carried out the study on the migration dynamics of alate aphids by yellow pan trap method and the population dynamics of Myzus persicae by systematic investigation mehod during 2015 to 2016. The results showed that: (1) Myzus persicae usually went through winter on peach trees and winter vegetables; eggs of Myzus persicae hatched into fundatrixes between the end of February and early march, then reproducted 3 generations on peach trees, alate aphids occurred in late March to early April; (2) alate aphids began to transfer in early April, and transferred to tobacco fields between first and middle of May and bred with virginogenia; the number of aphids had a peak in first and middle of July, and declined after August, then moved back to peach and cruciferous vegetables in September; (3) the natural enemies of Myzus persicae mainly included Aphidius gifuensis Ashmead, Aeva pyrastri and Coccinellidae. Aphidius gifuensis Ashmead was the domaint population, which accounted for 88% of the total numbers and gained 29.03% natural parasitic rate.