To observe efficacy of Yang-warming method for functional constipation in patients with type Ⅱ diabetes.Methods:Sixty patients were randomized to treatment group (n=35) and control group (n=25), to be treated with Modified Dahuang Fuzi Xixin Tang and Congrong Tongbian Oral liquid respectively. Thirty days(2 treatment courses) later, to measure efficacy and stool.Results:In treatment group, 5 patient cured, 11 significantly effective, 11 effective, 8 with no response, total effective rate=77.1%; In control group, 1 cured, 4 significantly effective, 4 effective, 11 with no response, total effective rate=45.0%. The two groups had significant difference (P<0.05).Conclusion:Yang-warming Method has good efficacy for functional constipation of patients with type Ⅱ diabetes.