Abstract: Objective: To compare the short- and long-term effects of procedure for prolapsed and hemorrhoid(PPH) and Milligan-Morgan hemorrhoidecObjective: Tomy(M-M) in the treatment of severe hemorrhoids. Methods: One hundred and sixty-six patients with grade Ⅲand Ⅳ hemorrhoids were followed up for 5 years， and divided inObjective: To PPH and M-M group(83 cases each group). The short-term effects，long-term complications and recurrence in two groups were compared. Results: The differences of the time of operation and hospitalization stay，hospitalization expense，pain index and incidence of short-term complication between PPH and M-M group were statistically significant(P ＜ 0. 05 Objective: To P ＜ 0. 01). The differences of the recurrence rates between PPH group and M-M group with grade Ⅲ in 3 and 5 years after operation had no statistical significance (P ＜ 0. 05). The recurrence rate of 5 years after operation and incidence of complications of 3 and 5 years after operation in PPH group with grade Ⅳ were higher than those in M-M group(P ＜0. 05). Conclusions: The short-term effects of PPH in the treatment of grade Ⅲ and Ⅳ hemorrhoids are better than those in M-Mgroup，but their long-term complications and recurrence rates are high. The PPH treatment is fit for the patients with grade Ⅲ prolapsedinternal hemorrhoids and mixed hemorrhoid which is mainly composed of internal hemorrhoids. The M-M treatment is fit for the patientswith grade Ⅳ hemorrhoids and mixed hemorrhoid which is mainly composed of external hemorrhoids.