A dual-core photonic crystal fiber (PCF) polarization splitter based on lead silicate glass is proposed. The characteristics of the polarization splitter are analyzed using full-vector finite element method. Compared with the silica glass PCF polarization splitter with the same structure, it is shown that the new material polarizer can realize splitting with less coupling loss and higher extinction ratio. When the wavelength is 1 550 nm and the PCF length in the beam splitter is 688 μm, the coupling loss is only 0.001 9 dB, and the extinction ratio for the input core is -64.1 dB.