Paleomagnetic investigation on the non-marine Permo-Triassic transitional succession of the Dalongkou section in Jimsar, Xinjiang reveals that there are 78 polarity intervals in the upper part of the Wutonggou Formation and the Guodikeng Formation; and they are mainly reversed polarity intervals intercalated with some normal and transitional intervals. The upper part of the Wutonggou Formation is dominated by reversed intervals, intercalating 2 normal and transitional intervals. It can be correlated with of the lower part, i. e. the Da member of the Dalong Formation of the Shangsi section, Guangyuan, Sichuan. The top part of the Wutonggou Formation and the basal part of the Guodikeng Formation are characterized by frequent change of normal and reversed intervals, and can be correlated with the middle part, i. e. the Db member of the Dalong formation. The lower part of the Guodikeng Formation is represented mainly by reversed intervals, intercalated with 2 normal intervals, and can be correlated with the middle-upper part, i. e. the DC member of the Dalong Formation. The lower-middle part of the Guodikeng Formation comprises mainly reversed intervals, intercalating 2 normal intervals, and can be correlated with the upper part, i. e. the Dd member of the Dalong Formation. The middle-upper part of the Guodikeng Formation is also characterized by reversed intervals with some normal intervals, and can be correlated with the lower part, i. e. the Fa member of the Feixianguan Formation of the Shangsi section. Based a on classification and correlation of magnetic polarity zones, the Permo-Triassic boundary is placed between the Fa and Dd, that is to say, between bed 41 and 42 of the Dalongkou section.