Abstract: Mg-PbO₂-Ti-PbO₂-PTFE composite pyrotechnic thin films were prepared by magnetron sputtering and vacuum evaporation. The component of the thin film was analyzed by X-ray photoelectron spectroscopy (XPS). Combustion linear velocity was measured to analyze its combustion process, and bonding strength between the thin film and the substrate was measured. The results show that PbO₂ thin film can be obtained by the vacuum evaporation, and good bonding strength exists between the composite pyrotechnic thin film and the substrate. The combustion linear velocity is (331.82±9.23) mm·s^-1 under constraint-free condition and (435.98±18.60) mm·s^-1 under constraint condition, with error smaller than 5%, meanwhile, combustion time and length have good linear relationship.