Yili block of western Tianshan belt is a key constituent of the southwestern Central Asian OrogenicBelt(CAOB).Late Devonian to Carboniferous arc-related volcanic rocks are widespread in the northern andsouthern margin of this area and provide relevant clues or proofs for the tectonic evolution of the TianshanOrogen.To reveal the petrogenesis and tectonic setting,we conducted geochemical 、Sr-Nd isotopegeochemical and chronological studies on these volcanic rocks in Wusun Mountains.In addition,we consultreference material of other scholars who have conducted relevant studies on volcanic rocks in Yili block toensure that we can draw a integrated conclusion on the genesis of the Dahalajunshan group.