Objective To observe the therapeutic effect of hydrargyrum oxydatum crudum medicinal twist filling-extubation plus Hanley technique for high position u-shaped anus fistula.Methods hydrargyrum oxydatum crudum medicinal twist filling-extubation plus Hanley technique was adopted for 69 cases

and the control group（68 cases）was treated with Hanley technique only.Observed were therapeutic effect

changes of symptoms and signs after operation

score of complications

healing time of both groups.Results The clinical curative rate of treatment group and control group was 94.20% and 82.35% respectively.The difference was of signifi- cance（P<0.05）.The scores of external secretion

internal secretion

remaining abscess

remaining induration

and accumulated blood in the residual cavity in the treatment group were all superior to those of the control group with the significant difference（P<0.05 or P<0.01）.Conclusion Hydrargyrum oxydatum crudum medicinal twist filling-extubation plus Hanley technique is a re- markable and side-effect free therapy for high position u-shaped anus fistula.