Abstract: By now fewer research works have been done in Qimantage area, western section of Eastern Kunlun Mountains. A little published dating data fell into Indosinian period. A series of zircon fission track ages from granitoid samples were achieved and multiphase tectonic-magmatic activities were revealed in this paper. The zircon fission track age range from 201 Ma to 109 Ma might be divided into four groups, i.e. 201 Ma, 185 Ma, 164-163 Ma and 139-109 Ma. These ages indicate two compressional and two stretching tectonic activities. The 201 Ma and 139-109 Ma ages present northward subductions of Qiangtang Terrane and Gangdise Terrane in Middle—Later Triassic and Late Jurassic respectively, resulting in collision-convergences with north-side terranes. The ages of 185 Ma and 164-163 Ma reflect post-orogenic stretching events in Early Jurassic and Late Jurassic, respectively.