The combination rule of high conflict evidence is one of the important issues in D-S theory since it gives error results that contrary with the instinct. Combining relative theories into D-S theory is an effective way in dealing with the inherent defects of D-S theory. Based on the max-entropy and D-S theory, a basic belief max-entropy assignment function is proposed. Then a model based on max-entropy is obtained by combing Max-entropy with classic D-S theory and the alternative D-S theories, relevant rational formulas are presented. Theoretical analysis and experiments show that the incorporation of the new max-entropy evidence into D-S theory can better process high-conflict information by re-allocating the basic belief value of the non-single focal elements proportionally into the single focal elements.