Abstract: Yegezikala granite situated near Saertuohai, one typical stitching pluton, intruded into Dalabute ophiolitic complex. The SHRIMP zircon U-Pb dating results of Yegezikala granite yield an age of 308±3Ma (MSWD＝0.83), which indicates the emplacement of Dalabute ophiolite might be before 308Ma. Due to the formation age of gabbros (Sm-Nd isochron age 395Ma, LA-ICP-MS zircon U-Pb age 391Ma) in Dalabute ophiolite, the formation age of Dalabute ophiolite is well constrained. Both sides of Dalabute ophiolite are Lower Carboniferous volcanic-sedimentary strata with continuous strata sequences and comparatively distinct rock associations, so Dalabute ophiolite is not a suture zone. Integrating the previously proposed tectonic models such as slab window and accretionary wedge, we infer that Late Paleozoic tectonic evolution in West Junggar is dominated by the passive basin filling in the residual paleo-oceanic basin and the Paleozoic accretion accompanied by subduction of paleo-oceanic crust in West Junggar ceased before Late Carboniferous determined by the stitching granites and diorite dykes.