Abstract: The statistical distribution rule of grain size of three sample was detected by the electron back-scatter diffraction， and the orientation image and the orientation distribution function were measured，then the ratio of grain with the different microtexture and the distribution status of orientation of grain were gathered. The effect of the distribution status of grain size to the microtexture was analysed. The results showed that the content of favorable texture 111∥ND increased with the concentration of the grain size distributing, and the testing results of the microtexture from the orientation image and the orientation distribution function were coincident. There was definite relation between the microtexture character and the grain orientation difference.