Abstract: For repairing the incomplete complex 3D models, a novel detail-preserving hole-filling method is presented in this paper which can recover the salient geometric details of the filled region. Firstly, we detect and match the feature lines in the vicinity of holes. The base surface of the missing region can be constructed using a dynamic programming scheme. Then, a layered shrinkage strategy of triangle refinement and a measurement of the refining order are presented to recover the geometric details from the boundary to the center region of the holes. Finally, a bi-Laplacian system with feature lines constraints is adopted to smooth the boundary of holes and recover the local salient features in the filled region. Experimental results demonstrate that our hole-filling algorithm can capture the global structure and recover the geometric details of the surface effectively and robustly.