Abstract Objective: the treatment of circular mixed hemorrhoid operation, mostly local injury in operation, complications after multiple defects. Observation of using different stripping ligation operation in the treatment of circumferential mixed hemorrhoids curative effect, and discusses the function of the anal sphincter and the relationship between the onset of circumferential mixed hemorrhoids. Operation method: on circular mixed hemorrhoid by piecewise external dissection, internal hemorrhoid ligation, and hemorrhoid ligation of internal hemorrhoids ichor injection of zone method. For varicose veins not releasable circumferential mixed hemorrhoids anal sphincter, and the connective tissue type annular mixed hemorrhoids give anal sphincter loosening. Results: 164 cases were cured in 158 cases, accounting for 96%, 6 cases, accounted for 4% of all effective, treatment 1221 days, average 16 days after the operation, one year follow-up, with follow-up results of 156 cases, including 2 cases with anal wet, pruritus, with no recurrence and secondary to anal fissure, anal stenosis. Conclusion: connective tissue type annular mixed hemorrhoids patients, the anal sphincter tension, poor elasticity, operation for anal sphincter loosening, can reduce the pain after the operation, prevent local edema, and can prevent the operation after anal stenosis. Varicose vein type annular mixed hemorrhoids patients, most of the anal sphincter relaxation, operation is not releasable anal sphincter, also won't cause anal stenosis. The anal sphincter dysfunction and the ring-like mix hemorrhoids the pathogenesis remains to be : Circular Mixed Hemorrhoids ligation of anal sphincter Xiaozhiling injection