Terraces are commonly developed in several rivers at the North Tianshan piedmont. There are 6 to 8 terraces in the Anjihai River. Based on the age dating and regional geological correlation, the Anjihai River terraces were formed in the late Middle to early Late Pleistocene (ca. 140 to 120 ka ago). The main factors affecting the formation and development of the river terraces were late Quaternary tectonic activities and climatic changes. The local tectonic activity and climatic change controlled the changes of the relative height and number of river terraces at the North Tianshan piedmont.