Abstract: Aerial triangulation is the core process in aerial photogrammetry which determines the accuracy of 4D products.The data processing procedure and accuracy analysis method of aerial triangulation for ADS40 linear array images are different from that of frame images.The basic principle of aerial triangulation for three line scanner images is introduced firstly.The automatic tie point matching,blunder detection,variance component estimation,datum transformation and the weight of GPS/IMU observations in the combined adjustment are discussed.The accuracy analysis method of aerial triangulation for ADS40 linear array images is concluded.Experimental results show that using the data processing method concluded in this paper we acquired a satisfactory result.