Abstract: Towing pool is the main experimental facility to study the hydrodynamic performance of large structures. In order to reveal the vortex induced vibration response of underwater manipulator and solve the problems that the speed regulation form of traditional vortex induced vibration device is single and can not be tested continuously, a vortex induced vibration test device suitable for underwater manipulator is innovatively designed by using TRIZ and AHP (Analytic Hierarchy Process). Firstly, the technical maturity prediction, system analysis of the vortex induced vibration test device are carried out, and the development trend, existing problems of the existing vortex induced vibration test device are determined. Then, the conflict matrix is used to solve the technical conflict, and three alternative innovative schemes are obtained. Finally, the optimal scheme is determined in the three innovative design schemes through AHP, the general solution is transformed into a special solution, and the vortex induced vibration test device of underwater manipulator which can create multiple flow fields of parallel flow and shear flow is innovatively designed, which realizes the multiple flow field vortex induced vibration test of underwater manipulator under a single device.