With the development of market economy reform, CPA CPA ethics code of conduct as a major guiding role to play. CPA staff of professional ethics is a prerequisite for the audit, certified public accountant assumes the risk of accounting information filter to reduce the cost accounting information identifying the responsibilities, known as "economic police." As the number of favoritism, fraud phenomenon, concerns, remodeling CPA ethics is becoming increasingly urgent. Existing laws and regulations of the imperfect and the current CPA firm occupational environment is deteriorating, in the current scandals have exposed the social audit, audit integrity Losing the people, the integrity of the entire industry suffered a serious crisis situation, we must rethink the CPA Ethics for the current number of undesirable phenomena, causes and consequences of perfect CPA professional ethics. To ensure that the information in the audit report is true, complete and secure. This article describes the moral failure of several CPA mainly. It illustrates the causes of these bad acts, including the independence of the lack of accountability mechanism is not perfect, non-compliance and not deterrent punishment firms, professional environment, three major aspects of chaos, and each side is also covered by a number of factors. This moral failure on the causes of these made some sound recommendations, such as the protection of CPA independence, reform of office organization, to strengthen penalties for violations of the CPA, CPA practice environment should be clean, to establish industry survival of the fittest system