Abstract: To research the effective method for active vibration control of vessel structure,an Independent Modal Space Control（IMSC） technique based on Linear Quadratic Regulator（LQR） method was adopted to design the controller,taking an active vibration control of a piezoelectric smart beam,which is under the vessel＇s vibration signal excitation.The finite element model of the piezoelectric composite structure was developed based on tthe Hamilton＇s principle.Furthermore the high precise direct integration method was used to calculate the displacements of first three order modes.A numerical simulation of active vibration control was performed.The rresults show that the control can be implemented effectively and it provides a theoretical basis for active vibration control of vessel structure.