政府采购的确有利于防止腐败现象的发生 ,但它有赖于一系列防腐机制的建立和完善。“防腐”应该追求边际成本与边际收益相等的“最合意的度”。本文从管理体制与内部制衡、规则控制与程序控制、社会的全方位参与等方面对政府采购中的防腐机制作了深入探讨。指出当各种防腐机制的边际成本与边际收益之比大致相等时 ,其发挥的效用就可处于最大化状态 Government procurement is indeed conducive to preventing corruption, but it depends on a series of anti-corrosion mechanism to establish and improve. “Antisepsis” should pursue the “most desirable degree” of marginal cost equal to its marginal benefit. This article discusses in depth the anticorrosive mechanisms in government procurement from aspects of management system and internal checks and balances, rules control and program control, and all-round social participation. Pointed out that when the marginal cost of various anti-corrosion mechanism and marginal revenue ratio is roughly equal, its effectiveness can be maximized