Aiming at the problems of complex light screen structure and low measurement accuracy of typical photoelectric test system,a linear laser assisted area array CCD optical imaging method to measure the position information of the projectile is proposed in this paper.By analyzing the imaging principle of the projectile passing through the laser screen on the area array CCD,the correlation function between the position information of the area array CCD pixel occupied by the projectile imaging and the spatial position of the projectile is given.Combining with the encoding point position of the projectile passing signal received by the linear array photodetector,the calculation model of the projectile spatial position is constructed.According to the simulation analysis,the maximum error of x,ycoordinate in 1 m×1 m detection area is less than 3.5mm.Through the comparative experiment with the wood target test,the scientificity and correctness of linear laser assisted area array CCD optical imaging measurement of projectile position information is verified.