Abstract: To explore the correlation between microstructure and deformation texture, the textures of copper wire were investigated in detail by XRD with a precision texture measurement suitable for wire samples provided. The radial distribution of deformation textures was analyzed by means of ODF. The results demonstrated that the surface textures of single-crystal copper wire consist of <100>, <112> and <110>, among which the <100> increases from surface to center of the wire and becomes the main texture in central layer, while <112> tends to increase then decrease from surface to center and <110> tends to decrease. However, the surface textures of poly-crystal copper wire consist of <100>, <112> and <111>, among which <100> tends to increase then decrease and <112> tends to decrease then increase from surface to center, while <111> tends to increase and both <100> and <111> become the main texture in central layer.