Abstract: The co-seismic deformation inversion mode due to seismic fault has been set up considering the earth-stratified structure.Using the nonlinear inversion formulation the simulated calculation and inversion analysis has been made to study the two main earthquake faults(strike slip fault and dip slip fault) separately.The inverted results show that the inversion mode could well invert out the fault dislocation parameters and could be better settle down the inversion work to the practical seismic fault co-seismic inversion problem.