The advanced rendering technologies of DirectX 11 were studied and applied to the 3D game engine. Advanced rendering technologies of DirectX 11 included MultiTex, CubeMap, NormalMap and ShadowMap, etc.. MultiTex was used to implement 3D terrain rendering, CubeMap was used to do environment map rendering, NormalMap was used to do special texture processing and ShadowMap is used to achieve the effect of mature realistic shadow. The paper also gave a detailed framework of interpreter and multi-branch of rendering core framework design, and completed the related technical cases to test on the engine. The result showed that the engine was true to life and effective in processing graphics.