提出一种具有实用价值的步进延迟可调的多抽头宽带光纤延迟线。首先简要介绍了光纤延迟线的优点、工作原理和基本结构，分析了光纤延迟线的增益、带宽、动态范围和失真指标，着重分析了多抽头宽带光纤延迟线的光纤分配网络的设计和实现。最后对设计的多抽头宽带光纤延迟线进行了测试，给出了测试方法和测试结果，并将它同国际、国内其他同类产品做了对比，描述了它的应用前景和应用领域。

The multi-tapped wideband optical fiber delay line with the practical value and the adjustable step delay is introduced. Firstly, the advantage, working principle and basic structure of optical fiber delay line are introduced. Then the gain, bandwidth, dynamic range and distortion index of the optical fiber delay line are analyzed, and the design and implementation of the optical fiber distribution network are discussed. Finally, the multi-mapped wideband optical fiber delay line is tested, and the test method and result are given. The multi-mapped wideband optical fiber delay line is also compared with other international and domestic products and its application prospect and application field are described.