Abstract: In order to improve the properties of durable press finished cotton fabric,cationic modification of the cotton fabric was performed and modification reaction on the cotton was confirmed by infrared analysis.The optimal process of cationic modification of cotton fabric was investigated,which could improve the dyeability of durable press treated cotton fabric without affecting its wrinkle resistance.The wrinkle recovery angle,strength,dyeability with pigment and direct dyes of the cotton fabric were tested.The results indicated that the cotton fabric after cationic modification has the wrinkle recovery angle improved,less strength loss,and better washing fastness.The dyeability of the non-formaldehyde durable press finished cotton fabric after cationic modification was improved significantly,especially with pigment dyeing.