Through reviews on development of different modus operandis to circumference mixed hemorrhoids and on literature about improved operation, this paper explained the curative effects, adverse effects and ascendancy of various kinds of operations.

• 摘要通过对环状混合痔不同手术方式的演变、发展以及近年来多种改良术式的文献回顾，对各种不同术式的疗效、不良反应及趋势进行了较为全面的阐述。