Based on the different decomposition rates among protein, fat, cellulose and saccharan, a new process to make full use of TOFU wastes was proposed, which includes continuous near-critical water decomposition, filtering and separation. The kinetics of TOFU wastes decomposition in near-critical water was studied. The apparent activation energy evaluated was 10.2 kJ/mol. From the analyses of the products, the feasibility of the new process was confirmed.