为了支持不同的业务要求出现了支持多优先级的WDM网络波长分配算法 ,但是在支持多优先级的波长分配算法中仍然存在公平性问题。为此 ,该文在支持多优先级的分配限额波长分配算法的基础上令波长限额随连接距离而变化 ,提出了一种公平分配限额波长分配算法。仿真结果说明这种算法有效地改善了多优先级 WDM网络波长分配算法中不同距离连接间的阻塞率差别 In order to support different services, a WDM network wavelength assignment algorithm that supports multiple priorities has emerged. However, there is still a fairness problem in wavelength assignment algorithms that support multiple priorities. Therefore, based on the support of multi-priority assignment quota wavelength assignment algorithm, this paper proposes that a method of fair assignment assignment of wavelength assignment is proposed by changing the quota of wavelength with the connection distance. The simulation results show that this algorithm effectively improves the blocking rate difference between different distance connections in the WDM network wavelength assignment algorithm