Abstract:The hydrolysis of corn protein into corn active peptide will present bitter taste，which limits the application of corn active peptide.This paper was to study the removal of bitterness from corn active peptides.The bitterness of corn active peptides was measured by flavor protease hydrolysis and activated carbon adsorption.The optimum debittering conditions of corn active peptide were obtained by single factor and orthogonal experiments.The bitterness value of corn active peptide was 1.07 when flavor protease was hydrolyzed 3 hours，the ratio of enzyme to substrate （E/S）1.5%，pH 6.0，and the bitterness value of corn active peptide was 1.27 when activated carbon was adsorbed 2 hours at pH 5.0，60℃，activated carbon dosage 3.0%.