To meet the requirement for simple structure and high-resolution,a method for correcting secondary spectrum of large frame array CCD aerial camera′s objective lens with long focal length and wide band based on wave aberration method is proposed.The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.The apochromatism objective lens of aerial camera is designed by common optical materials.Objective′ focal length is 400 mm,relative aperture is F/4,and work waveband is 420-850 nm.The figures of optical system,longitudinal aberration and modulation transfer function (MTF) are given.Designing results show that the MTF of every field above 0.75 in 60 lp/mm,and satisfy the requirements of imaging for large frame array CCD whose effective size is 36 mm×48 mm.