An all-solid three-core Photonic Crystal Fibers (PCFs) polarization splitter based on tellurite glass was researched. When one polarization state of light is close unlimitedly to resonance coupling conditions, the other polarization state is far from the resonance coupling conditions resulting in the weak coupling degree. Based on the resonance coupling phenomenon in the three-core PCFs, different polarization states can be separated. The simulation shows that the polarization beam splitter possesses the characteristics of short-length, ultra-band-width and high-extinction ratio at the wavelength of 1 550 nm. The length of this splitter is only 1.14 mm and its extinction ratio can reach －101.27 dB. The bandwidth of extinction ratio less than －20 dB reaches 100 nm, and the bandwidth of extinction ratio less than －10 dB reaches up 350 nm which covers E+S+C+L+U wave bands. This all-solid photonic crystal fiber polarization splitter not only has superior performance, simple structure, its all-solid structural design also can effectively avoid the circumstance of air-holes collapse during the fabrication of photonic crystal fibers, which provides an effective way for better performance polarization splitter.