Dynamic differential equation of a high-speed cylindrical roller bearing was established.Fine integral method and predict-correct Adams-Bashforth-Moulton multi-step method were used to solve the dynamic differential equations of high-speed cylindrical roller bearing.Then the dynamic characteristics of cage were analyzed and discussed.The result shows:it's unlikely to keep stable rotation of cage when the ratio of pocket clearance to guiding clearance becomes too large;when one of the rings is fixed

the other is working and the cage guided by the rotating ring has lower slip ratio;it is helpful for stable mass center motion of cage when the cage is guided by outer ring; when the bearing is co-rotating and its outer ring's speed is larger than its inner ring's speed

the cage is guided by outer ring

and the cage has lower slip ratio;when the bearing is counter-rotating and its inner ring's speed is smaller

mass center trajectory of cage becomes irregular;the value of cage slip ratio becomes negative when the cage is guided by outer ring.