High strength carbon fiber reinforced polymer (CFRP) with unidirectional lamina te structure has gradually developed into major materials in load bearing aero space components， and relevant demand in cutting and machin ing is increasing. Owing to significant anisotropy， CFRP materials with unidirec tional laminate structure incline to produce defects and are typical difficult to machine materials. By orthogonal cutting experiments， cutting force， specifi c energy， cutting temperature and machined surface are obtained when cutting T70 0 high strength CFRP unidirectional laminates under different fiber orientations. Based on experimental results， mechanical and thermal anisotropy of CFRP uniform laminates are discussed， specific energy maps under different cutting paramete rs are achieved， heat sources are studied， and the conduction model is established. By scanning electron microscope (SEM) topography of typical surfaces， surface formation mechanism under different fiber orientations is given.