Shielding effectiveness and optical transmittance are conflict in the preparation process of electro magnetic (EM) shielding and transparent film by indium tin oxide (ITO) film and metal mesh. Thus the compatibility of shielding effectiveness and light transmittance can be improved by the solution of the conflict among metal shielding, conductive and transparent. Transparent shielding film based on the metallic photonic crystal is proposed and experimentally demonstrated. The ITO/Ag periodic structured metallic photonic crystal transparent film is prepared by magnetron sputtering. The influences of the shielding effectiveness(SE), optical transmittance and the sheet resistance on the samples are studied. With the increasing of unit cycle metal film thickness, optical light transmittance in 600~800 nm wavelength is reduced by more than 10%. At the same time, the optical transmission spectra becomes narrower. But the light transmittance in 400~600 nm wavelength does not decrease with the increasing of metal film thickness, and even increased. With the increase of metal film thickness, shielding effectiveness is improved in microwave, sheet resistance reduces. Through the experiment, a different conclusion is drawn that the photonic crystal film shielding effectiveness does not totally depend on photonic crystal metal film thickness. The results show that the shielding effectiveness is as high as 70 dB, optical transmittance is greater than 50%, sheet resistance is lower to 2.1 Ω.