The Effect of saturation magnetization and interlayer exchange coupling on the time-evolutional magnetization reversal process in exchange-coupled composite (ECC) media with high coercivity was investigated by utilizing micromagnetic simulation. In order to apply magnetic field, we used magnetic printing. As a result, the magnetization reversal time of the hard layer became shorter as the saturation magnetization of soft layer increased because the magnetostatic field generated from the soft layer increased. Thus, as the saturation magnetization of both layers increased, magnetization reversal occured for the weaker interlayer exchange field.