Dynamics of axially moving laminated composite thinwalled beams is studied in the paper. Based on the variational asymptotic method (VAM) for the composite thin-walled beams, and using the EulerBernoulli beam model and Hamilton's principle, the dynamical equations of the composite thin-walled beam are established. The free vibration of the thinwalled beam is analyzed by the assumed mode method, and the accuracy of the modeling approach is verified by comparison to the other approaches. Then, the transverse vibration equation of the axially moving composite thin-walled beams is derived, which is solved numerically by the fourth-order Runge-Kutta method. Lastly, the effects of various fiber layup techniques and uniform velocities on the tip displacement response are investigated.