Objective:To evaluate and observe the clinical effect on the treatment of incarcerated hemorrhoids combined with Gu’s fumigating, washing and plastering methods at different operation timing. MethodsSeventy patients with incarcerated hemorrhoids were randomly divided into the emergency operation group (35 cases) and selective operation group (35 cases). Patients in the emergency operation group underwent PPH combined with external hemorrhoid dissection on the day of admission or the next day, and were treated with Gu’s fumigating, washing and plastering methods for 21 days after operation. The selective operation group was first treated with Gu’s fumigating washing and plastering methods for 3 to 7 days before operation, and continued to be treated with Gu’s fumigating, washing and plastering methods for 21 days after operation. The hospitalization days and wound healing time were observed, and the changes of main symptoms and signs (pain, edema, exudation, hemorrhage) and quality of life scores between the two groups were compared.  Results:①During the experiment, one case dropped out and one case was eliminated in both groups. There were 66 cases finally completed the experiment with 33 cases in each group. ②=2\*GB3On day 1,3 and 7 after operation, the VAS pain score in the elective operation group was lower than that in the emergency operation group (P < 0.05), and the degree of edema was milder than that in the emergency operation group (P < 0.05); On day 3 after operation, the bleeding amount in the elective operation group was less than that in the emergency operation group (P < 0.05). ③The hospitalization time of the selective operation group was longer than that of the emergency operation group. (P< 0.05). There was no significant difference in postoperative exudation, quality of life score and wound healing time between the two groups (P> 0.05). ④During the trial, no obvious adverse reactions occurred in both groups.  Conclusion:To reduce the related post-operation complications (pain, hemorrhage and edema) at the initial stage, selective operation should be considered in the first place for patients with incarcerated hemorrhoids.