Abstract: Objective: To summarize and analyze the reason of accidental shedding of radial arterial catheter for cardiac surgery ICU patients , and to explore the function and significance of quality circle control (QCC) activity on reducing accidental shedding of radial arterial catheter after cardiopulmonary bypass surgery. Methods: We established QCC and took "reducing the accidental shedding rate of radial aterial catheter" as the activity theme, grasped the existing conditions, set up the target,analyzed the reasons, drew up relevant plan and organized the implementation. Results: Through the QCC activity, the accidental shedding rate of radial arertial catheter decreased from 12.80% to 3.87% and the difference was statistically significant (P<0.05).Conclusion: QCC activity could significantly reduce the accidental shedding rate of radial arterial catheter, enhance the cooperation between doctors and nurses, and improve the quality of nursing work.