Abstract: The finite element model of AZ61B magnesium alloy tube during continual mandrel rolling process was established based on Abaqus software.The effect of the roll speed on tube formability was simulated and analyzed.The reliability of the model was verified by experiments.The results show that in the steady rolling stage, the circumferential wall thickness decreases with the increase of roll speed, and the uniformity of the average wall thickness is improved.The longitudinal elongation is positively correlated with the roll speed.When the roll speed increases from 2.46 r/s to 2.90 r/s, the average circumferential wall thickness decreases from 5.762 mm to 5.224 mm, the ear thickness decreases from 6.453 mm to 5.856 mm, and the longitudinal elongation increases from 41.33% to 51.86%.