This research makes use of the study that the deoxyribonuncleic acid (DNA) has and can absorption the special property of the material. Because the DNA has water-soluble quality but also as a result the scope of to limit its application. Therefore, try to modify after using chitosan to cross-linking processing make the DNA insolubilized, instead of using the copper nitrate. The DNA has electronegative phosphate groups with chitosan has cationic amine groups to form electrostatic force, making the DNA insolubilized. The modified DNA-Chitosan film on the test of absorbing the result to the Basic, Reactive, Acid and the disperse dyes. The result show, the DNA-Chitosan film its absorption is better than chitosan film. The modified DNA-chitosan can not only make the DNA insolubilized but also increase the rate of absorption.