The anisotropic features (orientation) of texture is very important for texture analysis. In this paper we introduced a new multi-channel model for texture analysis and synthesis based on the idea of isotropic and anisotropy power decomposition. We give the algorithm to determine the dominant orientation of the texture and to approximate the remain image with stochastic model. The experiment results for texture synthesis with this model and the performance comparison with her approach show the efficiency and flexibility of this method.