Abstract: A metallicdielectric photonic crystal thinfilm is presented. Its reflectivity and transmissivity are calculated with the transmission matrix method. The numerical results show that the photonic crystal film has an up to 99% reflectivity for millimeter and centimeter waves and about 50% average transmissivity for the visible light in microwave spectrum. The effects of the dielectric layer thickness, the metallic layer thickness and the total thickness of metallic layers on the transmissivity are examined, and the principles of material selection and structure design are presented. Due to these characteristics, the metallicdielectric photonic crystal film can be employed in effective reduction of radar crosssection of scattering on airplane canopy.