This utility model relates to a multi-pipe venturi wet desulfurization dust collector, especially one that employs two stages of atomization with an efficient dehydration device. Through the two stages of atomization, the flue gas is thoroughly mixed with alkali solution, and then through the separator, the purpose of high-efficiency dust removal and desulfurization is achieved. Application or application prospects: This technology is very beneficial for energy saving and emission reduction issues in coal-fired boilers, especially playing an important role under the current smoggy weather conditions. It is suitable for places and regions nationwide where coal-fired boilers are used to achieve control of pollutants in the flue gas.