Abstract: Taking the urban data of a certain area in Xining as an example, firstly, the Sony ilce-6000 camera carried by the Pegasus D200 UAV is used to collect image data, and the match-at module of infor software is combined with context capture to build a real 3D model. Then, the overall adjustment of large area multi view tilt image data is realized by two adjustment methods of multi view tilt image data. Combined with the dense matching and texture automatic mapping algorithm of multi view tilt image, a high-precision real 3D model is constructed. Finally, through the experiment, the spatial three-dimensional accuracy and three-dimensional model accuracy statistics basically meet the requirements of 1:500 large-scale mapping, which provides a way of thinking for  the construction of high-precision three-dimensional model.