A highly birefringent photonic crystal fiber was proposed based on lattice structure of elliptic layer. Properties such as birefringence, confinement loss, and mode area of the proposed photonic crystal fiber were simulated by the multipole method. Result shows that the birefringence of the propose photonic crystal fiber can be up to 2.26×10－3 at the wavelength at 1 550 nm,and the confinement loss is 2.8×10－3 dB/km. At the same time, the y polarization is double times of the x polarization, which can be used in manufacturing polarized polarization maintaining fiber. And the confinement loss keeps stable at the wavelength range of 1 300~1 500 nm.