Abstract: The present invention relates to an axial flow-type cyclone dust collection device including a main body and a plurality of guide vanes. The main body includes: a turning cylinder portion where dust gas is swirled; a dust gas inlet pipe and a de-dust gas discharge pipe which are arranged along the axis at the front and rear ends of the turning cylinder portion; and a dust collection port provided in the rear end area of the turning cylinder portion to guide the discharge of the centrifuged dust. The plurality of guide vanes are provided between the dust gas inlet pipe and the turning cylinder portion in the main body, and are radially arranged at a changing vane angle of which the lead-in angle in the front end with respect to the axis of the turning cylinder is different with the discharge angle in the rear end portion.