In this study, a combination of electromagnetic and seismic reflection methods have been used for forward model of subsurface layers. The electromagnetic wave equations are solved by considering the dielectric coefficient parameter, as a result, it provides in higher accuracy in separating the subsurface layers. In this research, Marmousi 2 model was used so that the mentioned model is composed of common Marmousi model which several hydrocarbon layers have been added. Then, using the experimental relationship between seismic velocity and resistivity parameter, this parameter was extracted. According to the lithological information of the model, a dielectric coefficient matrix was generated. Finally, using this information, a forward model code was generated to generate the final output of this model, which is the intensity of the reflected fields from the ground which received at the receiver. Then a forward model was prepared for the reflection seismic method and the output related to the reflection coefficient was obtained for this model. Comparing these two outputs, it results that when using the combined method, the layers are identified more accurately than using the reflection seismic method alone.