Abstract: By analyzing the apatite fission track data and forward modeling, the thermal history of relevant rock assemblage is studied qualitatively to semi?quantitatively in Junggar basin. The result shows that three uplifting?exhumating stages appeared in northern Yilianhabierga mountain: ① From the late stage of Late Jurassic to the early stage of Early Cretaceous, with denuded thickness in Toutunhe of 1.5~2.0km, in the south edge of Chaiwopu of about 1.0 km, and in the south edge of Tuositai of about 1.0 km; ② from the Late Cretaceous to the Early Paleogene, with denuded thickness reducing from the west to the east, in the south edge of Tuositai of 1.5~2.0 km, in Toutunhe of 1~1.5 km, and in the south edge of Chaiwopu of 0.8~1.0 km; ③ since the end of Oligocene, being large uplifting and exhumation stage, with denuded thickness reducing from the west to the east, in the south edge of Tuositai of 4.0~5.0 km, in Toutunhe of about 3.0 km, and in the south edge of Chaiwopu of 2.0~2.5 km