Vacuuming protection system of asphalt reaction kettle

The invention relates to a vacuuming protection system of an asphalt reaction kettle. The vacuuming protection system is characterized by comprising a plurality of reaction kettles (1), wherein each reaction kettle (1) is connected with a vacuuming branch tube (2); a check valve (3) is arranged on each vacuuming branch tube (2); the tail end of each vacuuming branch tube (2) is connected with a vacuuming main tube (4); the tail end of the vacuuming main tube (4) is connected with a buffer tank (5); the buffer tank (5) is connected with a vacuum pump (6) through a pipeline; the vacuum pump (6) is connected with a pool (8) through a water circulation pipeline (7). By adopting the vacuuming protection system of the asphalt reaction kettle, air inside each reaction kettle can be pumped into the pool through the vacuum pump and is discharged outside, and due to adoption of the check valves on the vacuuming branch tubes, the situation that materials in other reaction kettles flow back into one reaction kettle together with air can be avoided, so that material mixing can be prevented, and normal production can be ensured.