Gas leakage monitoring and protecting device

The utility model relates to the technical field of gas leakage monitoring devices, and discloses a gas leakage monitoring and protecting device which comprises connecting pipelines at the two ends, blocking columns are fixedly installed on the inner sides of the connecting pipelines at the two ends, a monitoring box is arranged on the outer sides of the connecting pipelines at the two ends, and blocking blocks are arranged on the inner side of the monitoring box. The blocking block divides the inner space of the monitoring box into a left space and a right space, the left space and the right space are both communicated with the inner space of the connecting pipelines at the two ends, and the positions, communicated with the connecting pipelines at the two ends, of the left space and the right space are located on the two sides of the blocking column correspondingly; according to the gas leakage monitoring and protecting device, by arranging the structures such as the monitoring box and the compression displa