Communication and lightning protection system used on building roof

The invention provides a communication and lightning protection system used on the building roof. The position of a lightning rod in the prior art is generally fixed, however, the position and the height of a lightning rod body in the system are adjustable, so that the position and the height of the lightning rod body can be changed according to a communication effect demand of an antenna; the lightening rod can be usually lowered and moved to a position without influence on the communication quality of the antenna in non-thunderstorm days, and the lightening rod can be adjusted to the highest position in thunderstorm days and reach the optimal position, and the optimal lightening protection effect is realized. The communication and lightning protection system used on the building roof has the advantages of simplicity and practicality and has broad application prospect. 本发明提供了种用于大楼楼顶的通信和避雷系统，在现有技术中，避雷针的位置般是固定，而在本发明中，避雷针针体的位置和高度是可调节，因此，就可以根据天线的通信效果的需要，改变避雷针针体的位置和高度；通常在非雷雨天气的时候，可以将避雷针的高度降低，移动到不影响天线通信质量的位置，而在雷雨天