The invention relates to a deep-hole smooth tunnel blasting system. The deep-hole smooth tunnel blasting system comprises a multi-shaft drilling mechanism and a deep-hole smooth blasting mechanism; the drilling mechanism comprises a drill rod arranged on an adjusting bracket, the drill rod is driven by a horizontal driving mechanism to move horizontally and implement hole digging operation, and a spatial position, located on the adjusting bracket, of the drill rod can be adjusted; the deep-hole smooth blasting mechanism comprises a plurality of explosive material charging tube standard joints arranged in a blasting hole; tube openings of the explosive material charging tube standard joints are sequentially connected to form a blasting tube, and trays are arranged on the connecting parts of adjacent explosive material charging tube standard joints for supporting explosive materials; a base is arranged at one end of the blasting tube, and a top cover is arranged at the other end of the blasting tube; and a through hole is formed in the tray surface of the tray for penetrating of a detonating cord, the detonating cord sequentially and upwardly penetrates through the through hole in the tray from the base and leads out from a through hole formed in the top cove of the blasting tube, and cracks are further arranged on the tray. The deep-hole smooth tunnel blasting system can improve the drilling efficiency, and weaken the influence of complex geological environment of a coal mine on explosive material charging at the same time, and premature overflowing of explosion gas is prevented.