Sampling rifle position alarm belongs to sampling rifle auxiliary assembly technical field, including casing, CPU, angle sensor, display screen, alarm lamp, bee calling organ, on & off switch, key and fixation clamp return to zero. The utility model discloses a stand alone type sampling rifle position alarm is applied to among the smoke and dust sampling process of thermal power plant to the sampling rifle offset suggestion of reporting to the police, makes and samples rifle mouth just to flue gas airflow direction. The utility model provides an angle sensor is applicable to the dynamic measurement of angle, can in time detect sampling rifle position and change, carries out real -time supervision and warning to the position of sampling rifle. The utility model discloses a novel angle sensor, the precision is high, small, light in weight, and the reliability is high, and line display can accurate real -time measurement sampling rifle be advanced for the corner of flue and reference azimuth and through the display screen to convenient and the combination of sampling rifle, and help testing personnel in time adjusts the position of sampling rifle, reaches quick accurate purpose of sampling.