Reasons for abnormal transactions in financial markets may be multifaceted，operation error is undoubtedly one of the important causes of abnormal transactions. As the financial operating environment becoming more complex，operational risk in financial sector has continued to rise，with stronger risk conductivity and more serious harm. International financial institutions and financial regulators have played more and more attention to the management and regulation of operational risk. Due to insufficient attention to operational risk and its management，China’s regulation of financial operational risk is still a large gap compared with developed countries. It is essential for China to further strengthen the regulation of operational risk in financial sector.