We have designed and fabricated a polarization LED utilizing asymmetric nanograting metasurfaces, characterized by distinct grating structures on the top and bottom surfaces. Experimental results indicate a 34.66% improvement in polarization light extraction efficiency within ±60°relative to traditional metal-coated sapphire substrates. The measured average extinction ratio surpasses 21.62 dB within this angular range. By incorporating a half-wave plate function at the bottom through asymmetric nano-grating metasurfaces, this LED design streamlines fabrication processes, reduces complexity, and enhances the efficiency of linearly polarized light. This innovative approach presents a promising solution for Micro-LED failure analysis, advanced optical displays, communication systems, and photonic computing applications.