The invention provides a dust suppression device used for synchronously dust removing during mine drilling. The dust suppression device comprises a vertically-arranged steel-made sleeve cylinder; a corrugated extending-retracting protection cover is arranged at the lower end of the steel-made sleeve cylinder in a sealing communicating mode and of a structure with the lower portion being wide and the upper portion being narrow; a corrugated extending-retracting connecting sleeve is arranged at the upper end of the steel-made sleeve cylinder in a sealing communicating mode. A sealing rubber ring is further arranged at the upper end of the corrugated extending-retracting connecting sleeve; and an air outlet pipeline is arranged on one side of the steel-made sleeve cylinder in modes of communicating and inclining downward from the end communicating with the steel-made sleeve cylinder to the other end of the air outlet pipeline. The problem, proposed in the background technology, that dust produced by a mine drilling device in the drilling process is liable to be sprayed out from a gap between the bottom end of a dust removing device and the ground, no corresponding storage device is provided for the extracted dust, a small quantity of fragments exist in the dust produced during drilling, and the fragments is quite liable to damage a pipeline when fluttering along the pipeline so that the dust removing device cannot used is solved. The invention belongs to the technical field of mine dust removing.