采用与同类商业软件比对的方法，在THz折叠波导行波管算例中对自编NEPTUNE3D程序的有限电导率模块进行有效验证和确认，包括冷腔损耗与计及损耗的热腔增益。比对结果表明：冷腔损耗计算相对误差在3%～4%左右，计及损耗的热腔最佳增益相对误差及最佳工作电压漂移相对误差均在2%左右。通过不同软件、冷腔损耗与热腔增益的比对，验证了有限电导率模块正确性和可靠性。此外，还对加工因素导致结构参数变化对冷腔损耗特性影响，做了规律性讨论。

The Finite Conductivity Wall module is verified and validated in terahertz folded waveguide traveling wave tube simulation compared with commercial software including attenuation result of cold test and gain result of hot test. The calculated results agree with each other well. Max relative error of attenuation in cold test is about 3%~4%, and max relative error of gain in hot test is about 2% with the optimal working voltage drifting relative error about 2%. In addition, the influence of geometric structural parameters on the attenuation result of cold test is also analyzed and discussed in detail.