The invention provides an atomizing nozzle for dry fog dust suppression. The atomizing nozzle comprises a nozzle body; the nozzle body is internally provided with a water inlet pipeline, air inlet pipelines, a mixing chamber, a water spray hole and air injection holes; the two ends of the mixing chamber are connected with the water inlet pipeline and the water spray hole correspondingly; and the air inlet pipelines are connected with the air injection holes and communicate with the mixing chamber through a through hole. According to the atomizing nozzle for dry fog dust suppression, the structure is ingenious, liquid is subjected to two times of atomizing, namely, bubble atomizing and pneumatic atomizing, thus, the diameter of atomized fogdrops can be smaller than 2.5[mu]m, a high operation speed is achieved, and the dust suppression effect is effectively improved.