基于分布放大暗孤子传输系统中存在增益随机变化，利用守恒量扰动法，研究了增益随机变化对暗孤子到达检测窗口时间抖动的影响。结果表明，增益随机变化对暗孤子速度产生了影响，并增大了暗孤子到达时间的抖动。引入非线性增益可以有效抑制增益随机变化增大的暗孤子到达时间的抖动。 Based on the stochastic variation of gain in distributed amplification dark soliton transmission system, the effect of random gain variation on the time jitter of dark soliton arrival detection window is studied by using the conserved quantity perturbation method. The results show that the random gain of the gain has an impact on the dark soliton velocity and increases the jitter of the dark soliton arrival time. The introduction of nonlinear gain can effectively suppress the jitter of dark soliton arrival time with increasing random variation of gain.