分析了主被动锁模光纤环形孤子激光器的运行机理，用分裂步长法作了数值模拟，获得了重复频率为１０ＧＨｚ，脉宽为９８５ｆｓ的稳定的孤子脉冲序列。通过孤子参量演化方程的求解，获得了光纤环形孤子激光器的稳定运行条件及孤子脉宽的解析表达式 The operating mechanism of the active and passive mode-locked fiber ring soliton lasers is analyzed. The split-length method is used to simulate and obtain a stable soliton pulse sequence with a repetition frequency of 10GHz and a pulse width of 985fs. Through the solution of the soliton parametric evolution equation, the stable operating conditions of the fiber ring soliton laser and the analytical expression of the soliton pulse width