The Kalamaili ophiolitic belt in East Junggar is one of the important ophiolitic belts in Xinjiang, the closure time of Junggar Ocean represented by the Kalamaili ophiolitic belt is still argued and unclear. Recently, the authors discovered that the Hongliuxia EW-trending schistosity zone cut the Kalamaili ophiolite belt is a dextral ductile shear zone, which was formed in collision process between the Yemaquan arc and the Junggar block. It indicates that the Hongliuxia ductile shear zone was formed at about 343 Ma B.P., and that the Junggar ocean should be closed before 343 Ma B.P., and the East Junggar was involved in collisional orogen at the end of Early Carboniferous.