The utility model discloses a boiler high temperature dry dust sediment device in small, broken bits, including installing in the casing and the hollow shaft of boiler furnace hopper bottom, be provided with open -ended interior casing in upper portion in the casing, interior casing open -top is the feed inlet of high temperature slag, and the bottom is connected with the discharge gate, the hollow shaft is located the casing, and the both ends of hollow shaft are provided with external high temperature resistant bearing frame respectively, and the one end of high temperature resistant bearing frame is equipped with the V -belt wheel, and the transmission is connected through V -belt with the V -belt wheel that pairs on the the motor output shaft to the V -belt wheel, installs the star rocking arm on the hollow shaft, and along being dentate ring type hammer, it is internal that star rocking arm and ring type hammer are located the inner shell outside installing through the pivot on the star rocking arm, be provided with big sediment pinion rack in small, broken bits on the well hypomere inner wall of interior casing, be provided with sieve in small, broken bits on the bottom inner wall of interior casing. The device make the system simple and direct reliable, the operation is safe in succession, reduce artifical intensity of labour, the energy consumption is low, the feature of environmental protection is good.