To solve the poor modeling performance caused by many blind areas and large difference in image resolution for complex buildings,a 3D surround photography and refined modeling approach is proposed for UAV photography.First,a 3D surround image acquisition route is designed for a small single-lens multi-rotor UAV according to the appearance of complex buildings.Then the acquired images are imported into Context Capture software,which are analyzed and processed for model establishment.Finally,DP-Modeler and 3ds Max are used to modify the model so as to solve the information missing such as lack of texture and fuzzy drawing.The proposed approach is then compared with traditional UAV tilt photography in modeling efficiency,model accuracy and texture details with two adjacent buildings in a park as research object.The results show that the proposed method has the advantages of high modeling efficiency,high precision and rich texture,improves the quality and efficiency of complex building modeling,solves the information missing in image acquisition via combined modification,and significantly improves the quality of model details.