Based on messages sent by users, the 3D animation automatic generation system of mobile phone, after a serial process of information extraction, plot planning, would generate a video animation and send it to the receivers. The layout planning is an important part of the automatically generated system, which can place the model to the space on the animation scene. Through the study of layout problems, this paper proposes a hierarchical layout method based on the regional and model layout. It includes qualitative planning and quantitative calculation, using semantic web technology to build hierarchical layout knowledge base, derivation of hierarchical layout qualitative planning scheme based on rule, dynamic calculation of model location. Finally, experimental results show that the hierarchical layout planning is effective and diverse, and it meets the requirements of automatic generation system for layout planning.