Late Paleozoic strata are widely exposed in the area of East Junggar,Xinjiang. The correct chronological division of its depositional age is not only important to establish the tectonic framework, but also to develop oil and gas. Nowadays,the research of magmatic rock and ophiolite suite has yielded fruitful results. However, the research degree on some problems is relatively low, such as the distribution of the Late Paleozoic strata, contact relationship of strata and so on. The division of Carboniferous and Devonian strata is not clear is one of the main research problems. Therefore,this study selects detrital zircon from three typical sedimentary strata to date analysis by using zircon U-Pb isotope dating method,which is the correct division of its depositional age from the perspective of chronology. The result indicates the youngest age of detrital zircons from Devonian sandstone ranges from 346 Ma to 312 Ma; detrital zircon age spectra show five age ranges of 380～310 Ma(71.8%), 445～385 Ma(11.7%), 480～450 Ma(3.9%), 540～485 Ma(4.5%),and Precambrian(8.1%). Combined with the research results of intrusive geochronology of this area,the depositional age of those strata can be identified to Carboniferous but not Devonian.