A mixed catalyst system, metal salt/oxycarboxylic acid, using DMDHEU as a crosslinking reagent to improve the durable press (DP) properties of cotton fabrics was studied in relation to foam application. The easy-care properties and physical properties were measured and metal contents of DP finished fabrics were measured in order to study of catalysis mechanism of mixed catalyst system. Better results were obtained in the aluminum sulfate/oxycarboxylic acid mixed catalyst system compared with the magnesium chloride/oxycarboxylic acid mixed catalyst system and metal salt single catalyst system. The enhanced catalytic activity of a mixed catalyst system was attributed to the complex formation. The foam finishing treatment improved physical properties of fabrics compared with the fabrics treated by the conventional process.