The invention relates to an automobile safety air bag steel pipe production line. A steel bar equal-length breaking machine adopts an automatic equal-length opening cutting method, and is used for breaking a steel bar; a straightening machine is additionally provided with a safety material delivery roll; a detection machine adopts a low-frequency eddy detection device and a high-frequency eddy detection device; the detection machine is provided with two discharging devices with structures that a discharging rod is inserted into an U-shaped groove hole in a sleeving way, a discharging arm and a rotary arm are fixedly arranged on each discharging rod, the other end of each rotary arm is hinged to a piston rod of a discharging air cylinder, a support roll is arranged on each discharging bracket, a receiving cloth belt bypasses a support rod and is wound on a receiving and discharging cloth roll, a roll shaft of each receiving and discharging cloth roll is fixedly connected with an output shaft of a gear reducer, an input shaft of each gear reducer is fixedly connected with a rotary shaft of a discharging motor, and the two discharging devices are symmetrically arranged at the two sides of a conveying roller. The automobile safety air bag steel pipe production line has the advantages that the steel bar equal-length breaking machine has a high automation degree; the steel pipe straightening machine adopts the rubber roll to deliver the material, so as to avoid the safety accidents; the detection mechanism adopts the semi-automatic charging method, so the manual labor intensity is decreased, and the surface and the inner wall of the steel pipe can be simultaneously detected.