The invention discloses a composite lead dioxide electrode plate, which comprises a composite lead dioxide anode plate and a protective net covering the periphery of the composite lead dioxide anode plate, wherein the composite lead dioxide anode plate is arranged in a framework and comprises a plurality of small anode plates spliced and connected with one another; and each small anode plate comprises a titanium substrate, a transition layer coated on the titanium substrate, an alpha-PbO2 interlayer coated on the transition layer and a beta-PbO2 active layer coated on the alpha-PbO2 interlayer; and the transition layer comprises at least one component of Pt, IrO2, Ta and Ta2O5. Correspondingly, the invention also provides a method for manufacturing the composite lead dioxide electrode plate. The composite lead dioxide electrode plate prepared by the method has long service life, the passivation process is stable, and an excellent implementation effect is achieved.