In view of the rise of temperature, and being bending fatigue to the composite material under ultra-high three-point, this paper utilizes the commercial software ABAQUS for modeling and simulating the thermal effect in the experimental process, and the main heat generation stage and position of CFRP specimen under fatigue load are obtained, The ultrasonic fatigue test under continuous load is carried out by using composite cooling method. The results show that there is no traditional fatigue limit for CFRP. With the change of stress level, there is a damage competition mechanism in the ultra-high three-point bending fatigue failure of CFRP. The main damage morphology is a pit corrosion at low stress level, and delamination and transverse crack at high stress level.