Highly-effective electric dust catcher capable of achieving off-line deashing

The utility model provides a highly-effective electric dust catcher capable of achieving off-line deashing, which is combined by a plurality of electric dust catchers which are connected in parallel, the lower portion of the electric dust catcher is provided with an ash bucket, a multi-layer dedusting electric field is arranged in each electric dust catcher, deashing devices are mounted both inside and outside the wall of the electric dust catcher, and an automatic control valve which is interlocked with the deashing electric field and the deashing device is mounted on the end portion of each electric dust catcher. The discharge concentration of the dust catcher capable of achieving off-line deashing is under one half of that of a conventional electric deashing, and the highly-effective electric dust catcher is economic, practical and environment-friendly, and saves energy, and is particularly suitable for deashing smoke in large and medium-sized boilders and industrial kiln furnaces.