We extracts multiple Line-Of-Sight（ multi-LOS） coseismic deformation fields through the interferometry of three different sets of ENVISAT ASAR data in the LOS direction

and constructs a double-fault rupture model of the Gaize earthquake by integrating deformation field characteristics with focal mechanism solutions. We also inverts the coseismic slip distribution of the Gaize earthquake though the steepest descent method and the layered crustal model of CRUST2. 0 under the constraint of the quadtree resampling of multi-LOS coseismic deformation fields. Results show that the deformation residuals of inversion are effectively controlled within 0 ± 10 cm. The major slip distributions of the mainshock fault are located at a depth of 2 km to 16 km along the fault plane

with a maximum slip value of approximately 1. 34 m at a depth of 6. 4 km. The slip distributions of the aftershock fault are mostly located at a depth of 2 km to 6 km along the fault plane

with a maximum slip value of approximately 0. 90 m at a depth of 3. 52 km. Both the mainshock and aftershock faults are principally ruptured with the normal mode

and the mainshock fault is also ruptured with a slight left lateral striking

which is not obvious in the aftershock fault. When the shear modulus is set to 3. 2 ×1010Pa

the inversion seismic moments of the mainshock and aftershock are approximately 6. 34 × 1018N·m and 1. 20 × 1018N·m

which lead to moment magnitudes of Mw6. 47 and Mw5. 98

respectively.