Based on a domestic deepwater jacket project, from the practical engineering angle, the theoretical evaluation method and selection criteria of constraint conditions of bar vortex-induced vibration during jacket construction are introduced, and the vortex-induced vibration of structural pieces during the final assembly is calculated. The results show that: the weaker constraint conditions make the bars more easy to generate the vortex-induced vibration; the sensitivity of vortex-induced vibration of bars with different specifications to the constraint conditions is different; the bars with high flexibility are of relatively higher risk of vortex-induced vibration, and the vortex-induced vibration of short and thick bars is more sensitive to the change of constraint state.