The invention discloses a system for removing blockage through tailing slurry. The system comprises a settling pond (1), a buffer pool (2), a ceramic filter (3), a pulp tank (4), a feeding pipe (5) and a discharging pipe (6). The settling pond (1), the buffer pool (2), the ceramic filter (3) and the pulp tank (4) are each provided with a tailing slurry conveying pipe (7), and the settling pond (1), the buffer pool (2) and the ceramic filter (3) are sequentially connected with the tailing slurry conveying pipes (7). The ceramic filter (3) is connected with the pulp tank (4) through the feeding pipe (5), and the feeding end of the discharging pipe (6) is arranged on the pulp tank (4). The system for removing blockage through the tailing slurry can achieve dewatering work in an energy-saving and emission-reducing mode, and can completely remove accumulated ore in the pulp tank.