The deformation of Mw 66 Earthquake on Nov25, 2016 in West Kunlun Mountain was observed from two directions using by Sentinel1 SAR databased InSAR technology. Based on the tectonic background, this study obtained a centimeterscale 3D deformation field and then verified its accuracy through comparison with surface ruptures and focal mechanism of this earthquake. InSARbased deformation field provides some recognition for the coseismic deformation and neotectonic movement patterns. ①The differences of coseismic deformation manifests the extension of seismogenic fault along the piedmont of West Kunlun mountain, striking 104°, 70km long and dipping SSE, which are characterized by mainly normal slip with dextral strikeslip. ②The coseismic deformation covers an elliptic area of about 100 km long and 60 km wide, showing multiple centers and multiple directions, with hanging wall subsiding 10~15 cm, horizontal sliding 2~6 cm, and footwall sliding 8~14 cm and vertical deformation of only3~1cm. Vertical deformation of hanging wall and footwall presents tensile features of four quadrants, in agreement with results of strikeslip shearing. ③Coseismic deformation is dominated by mode of elastic rebound, that is, the longterm tectonic stress was the driver for uplifting and northward intrusion of this region, while the local geomorphologies, i.e. surface rupture and graben basin, were the result of elastic rebound. ④The persistent uplift in the NE margin of Pamir plateau and structural deformation of normal faulting by this earthquake has confirmed the synorogenic extension model of the Muji basin (ieKougur extension), rather than the result of NWtrending extension of rightslip Karakoram faulting activity.