Gas leakage alarm for gas pipeline

The utility model discloses a gas pipeline gas leakage alarm, and relates to the technical field of gas alarm, the gas pipeline gas leakage alarm comprises a fixed frame, a motor is fixed on the outer wall of one end of the fixed frame, the output end of the motor penetrates through the side wall of the fixed frame and is fixedly provided with a threaded shaft, and the threaded shaft is in threaded connection with a moving block; a second mounting plate is fixed to the bottom of the moving block through a fixing structure, and a gas alarm body is fixed to the side wall of the second mounting plate. When the gas alarm detects gas leakage, the motor drives the threaded shaft to rotate so as to drive the moving block to move along the threaded shaft, so that the position of the alarm is changed, people in different areas can be alarmed and prompted, the efficiency of finding the gas leakage by people is improved, people can handle the gas leakage in time, and when the gas alarm is detected, the detection efficie