Abstract: This paper presents an approach on complex building reconstruction from images,point clouds and vector maps.The proposed method detects the ridge of complex building based on point data and feature lines extracted from images.And partitions complex building into different component parts by ridge lines.For gable and hip roof building component model,their roof edges are automatically searched by combining vector map,ridge and geometric restraints.The completed partition of complex building component models are generated and reconstructed by fitting roof planes with point data.The method is tested to be effective on complex building models reconstruction.