To observe the anti-CVH effect of warming moxibustion and its influence on the expression of CRFR2 (protein and mRNA) in the colon. Methods:CVH rat model induced by mechanical colorectal distention (CRD) and abdominal withdrawal reflex (AWR) scores were assessed by acute CRD after warming moxibustion treatment. The protein and mRNA expressions of CRFR2 in the colon were determined by immunohistochemistry and real-time PCR, respectively. Results:Warming moxibustion markedly attenuated the abdominal withdrawal reflex (AWR) scores in response to acute CRD in IBS rats; The expressions of CRFR2 (protein and mRNA) in the colon were significantly increased in the model rats than in the normal rats. Warming moxibustion increased the expression of CRFR2 (protein and mRNA) in the model rats. Conclusion:WM treatment may attenuate CRD-induced CVH in rats and this effect may be related to WM upregulation of colonic CRFR2.