A nearinfrared (NIR) polarizing beam splitter is designed based on a single layer subwavelength silicon grating, which is reflective for TE polarization and transparent for TM polarization around the incident angle of 45°. The design of the proposed beam splitter is based on the leakymode resonance effect and Brewsterlike effect of the subwavelength grating. Scattering matrix method and finitedifference timedomain method are utilized to design and analyse the structure. Simulation results show that both the reflection and transmission extinction ratios of the beam splitter are over 100 in the wavelength range of 1390~1600 nm. Moreover, the polarizing beam splitter has a relative big angular tolerance and the efficiency of the beam splitter under the illumination of a Gaussian beam with finite size is very high.