Abstract: Pitot tube is an important part of the aircraft atmospheric sensing system and is of a particular construction of the filament heater spirally wound into the inner wall of the tube and welded with it.According to the welded structure and the current level of welding technology,X-ray imaging system is the most intuitive and effective way to detect the welding conditions of the pitot heater and the inner wall of the tube by a simple analysis of the main advantages and disadvantages of various detection methods.The method can not only realize the effective detection of the welding status of the heating wire in each lap,but also shorten the detection time by more than 90%