The invention discloses an oxygen-coal ironmaking blowing device, which comprises a tuyere small sleeve (1) connected to the front end of a tuyere large sleeve (2). The tuyere small sleeve (1) therein is provided with an annular passage led to the interior of a furnace, the passage wall of an inner annular passage (9) of the annular passage is connected with the base of the tuyere small sleeve (1) hermetically, the inlet of the inner annular passage (9) is connected with a coal powder connecting pipe (3), the outer annular passage (7) of the annular passage is sealed with the base of the tuyere small sleeve (1), an oxygen passage (8) is communicated with the outer annular passage (7) in the tuyere small sleeve (1), and the inlet of the oxygen passage (8) is connected with an oxygen connecting pipe (4). The invention causes oxygen and coal powder to enter the tuyere small sleeve from different passages to ensure the safety of the blowing operation, synchronously the oxygen and the coalpowder are blown in the furnace by the annular passage so that the oxygen and the coal powder entering the furnace can be well mixed and combusted, and mill coal with relatively large reserves can beused for replacing the coke for ironmaking.