A series of La2Cu1-xFexO4 catalysts were prepared by sol-gel, the samples were characterized by XRD、NO—TPD and H2—TPR, temperature-programmed test was used to evaluate the activity of the catalyst. It is found that La2Cu07Fe03O4 has a good PM—NO removal activities. So CDPF was prepared by La2Cu07Fe03O4 for the steady-state condition of the engine bench research, and by adjusting ECU to control fuel injection. When the crank angle between main injection and post injection was 70°CA, there was so much HC emission to significantly increase the conversion rate of NOx.