This paper presents an automatic a-lignment method of three dimension object with non rigid deformation .The method combines point cloud alignment method based on the coher-ent point drift (CPD ) with dynamic deformation graph ,to form a dual scale alignment process composed of coarse alignment and fine alignment . In the coarse alignment process ,roughly align the source model to the target model by CPD method . In the fine alignment process :first ,simplify the source model by use of dynamic deformation graph ;second ,optimize the deformation energy function to get the optimal deformation parame-ters ;third ,make the deformation be extrapolated to all vertices of the source model ,to complete the au-tomatic alignment process .The method is applica-ble to complete or incomplete three dimension model’s non rigid registration .%提出一种针对发生非刚性形变的三维物体自动对准的方法。该方法将相关点漂移（C PD ）的点云对准方法与动态形变图相结合，实现了粗对准与细对准相结合的双尺度对准方法。首先，通过C PD方法将源模型初始对准到目标模型；其次，利用动态形变图简化源模型，高斯牛顿法优化形变能量函数求取最优变形场，并将该形变外推到源模型的所有顶点，完成自动对准。实验表明，该方法适用于完整或不完整三维模型的非刚性对准。
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