Free and forced vibro-acoustic characteristics of fluid-filled laminated cylindrical shell under initial hydrostatic pressure are analyzed. The vibration equation of shell is based on Love's theory, and filled fluid is adopted acoustic wave equation. Initial hydrostatic pressure is introduced into shell governing equation as axial and radial direction forces. The present fluid-structure interaction model is verified by comparing the natural frequencies with those in literatures and dynamic responses with FEM results. The two results show good agreement, and on basis of this, some parameters analysis is carried out. Numerical results show that boundary condition and ply-angle have influence on natural frequencies. Hydrostatic pressure increases the stiffness of composite cylindrical shell and natural frequencies. The results of this paper could provide some suggestions for the structural design of fluid contained cross-ply laminated composite cylindrical shell.