防雷接地装置的腐蚀极大地影响了防雷系统的安全运行, 严重时会造成防雷系统安全隐患。通过合理选取接地装置的腐蚀影响因素,建立了腐蚀评价指标体系,运用层次分析法求取指标权重集,根据专家评分得到单因素评价集，然后建立模糊综合评判模型对防雷接地装置腐蚀程度进行了评价，并利用该模型以重庆某处防雷接地装置为例进行了实例分析，根据最大隶属度原则得到接地装置的腐蚀程度等级。结果表明，该处接地装置腐蚀程度为中等，等级为Ⅲ级，需要采取合理的防腐蚀措施。

Corrosion of lightning protection grounding device greatly affects the safety operation of lightning protection system, and seriously causes hidden danger to the safety of lightning protection system. Firstly the corrosion factors affecting the grounding device were reasonably selected to establish a corrosion evaluation index system. Secondly the analytic hierarchy process was used to get the index weight set, and get the signal factor evaluation set based on the expert score. Then the fuzzy comprehensive model was established to evaluate the corrosion degree of lightning protection grounding device. With the instance analysis of lightning protection grounding device at somewhere in Chongqing, this model was used to get the grade of corrosion degree of the grounding device based on the maximum membership principle. The results show that the corrosion degree of grounding device there is medium of degree Ⅲ, and the anti-corrosion measurement is necessary.