The utility model relates to a rain-proof acoustic shield used for a dry electric reactor. The rain-proof acoustic shield comprises a rain-proof cap and a rain-proof grate, wherein a ventilation hole is formed in the top of the rain-proof cap; a supporting rod which is connected with the dry electric reactor is mounted on the rain-proof cap. The own shape and structural characteristic of the rain-proof acoustic shield determine that the rain-proof acoustic shield has excellent noise reduction property on the dry electric reactor loading a lot of harmonic waves, particularly, medium-high frequency noise radiant power can be effectively inhibited by the rain-proof acoustic shield, meanwhile, the rain-proof acoustic shield can be manufactured according to the dry electric reactors of different models, and various mounting requirements can be met. The rain-proof acoustic shield is particularly suitable for application occasions that the dry electric reactor is provided with higher end voltage and the current of the loaded harmonic waves is higher, an excellent rain-proof effect is realized, and the dry electric reactor is enabled to stably run under severe weather.