Highly reflective and surface conductive silvered polyimide films have been prepared via single-stage self-metallization techniques．Polyimide was synthesized by copolyeondensation of a dianhydride(3

3’

4

4’-benzophenone tetracarboxylic acid dianhydride(BTDA))and two diamines(4

4'-oxydianiline(4

4’-ODA)and 4

4’-thiodianiline(4

4'-SDA))．The information of the silver particle was recorded by XRD．It explained that the silver particles were reduced and then aggregated during curing cycle．The influence on the optical properties．electrical properties and structural morphology resuhed from the incorporation 4

4’-SDA has been systematically investigated by UV—Vis

four—point probe and SEM．The results suggested that the introduction of 4

4’-SDA could facilitate silver reduction and migration．also could improve the surface conductivity．The metallized film achieved its optimum reflectivity at a mole ratio(4

4'-ODA and 4

4’-SDA)of 1．The thermal stabilities of the films were investigated by TGA．it showed that the silvered film Was better than its matrix．