Using Sentinel-1 ascending,descending and Radarsat-2 dataset covering the Jiuzhaigou earthquake,the deformations along los direction of three orbits were extracted respectively,and the true vertical,north-south and east-west deformations along the surface of Jiuzhaigou earthquake was calculated by using multi platform joint observation method. The results show that the three orbital InSAR data have detected coseismic deformation along LOS direction,with a range of about 55km×45km,in a "nut-like shape",and the largest deformation in the direction of flight close to the satellite is 12.9cm(descending orbit),while flying away from the satellite the maximum deformation is 19.5cm(ascending track).The 3D deformation results show that the displacement reaches 23.4cm in the vertical upward,17.6cm in the vertical downward reaches,141.8cm in the north displacement,100.2cm in the south displacement,22.0cm in the east displacement,and 10.7cm in the west displacement. The blocks at both ends of the Shuzheng fault move asymmetrically and horizontally,and the hanging wall deforms more violently to the east from one side,which is consistent with the movement characteristics of a left-lateral strike-slip earthquake event.