A kind of single-core PCF splitter based on tellurite glass was proposed, defected holes were arranged in the outer cladding, they can bring about strong coupling effect between defected mode and the fundamental mode. FEM was used to analysis its characteristics. The simulation results show that this kind of splitter can split light in the bands of 1.3 and 1.55μm, propagate along the orthogonal polarized directions. For a propagation distance of 15 mm, the -20 dB bandwidth of crosstalk in 1.3 and 1.55 μm bands, reach 44.2 and 67.1 nm. The confinement loss at the wavelength are 0.063 dB and 0.0 48dB. The proposed splitter has low crosstalk and low confinement loss.