Novel tunnel ventilation airflow pressurizing device

The utility model provides a novel tunnel ventilation air flow pressurizing device, which relates to the technical field of tunnel ventilation and comprises an air pipe, an air exhaust ring is sleeved on one side of an air pipe body, the section of the air exhaust ring is curved, an air outlet of the air exhaust ring is communicated with the inside of the air pipe, an arc-shaped cover is fixedly mounted on the air pipe body, and the air outlet of the air exhaust ring is communicated with the inside of the air pipe. Air flow passes through the air pipe, a small amount of air flow in the air flow enters the arc-shaped cover through the air inlet, the air flow state in the air pipe is slightly influenced by guiding the small amount of air flow in the air flow, local loss of air pressure is small, and after the small amount of air flow enters the arc-shaped cover, the pressurizing assembly is started, so that the air flow state in the air pipe is not influenced. Air flow entering the arc-shaped cover forms compre