Abstract: Based on the linear potential flow theory,the hydrodynamic coefficients of the multi-floating hinged wave energy convertor“Starfish”are calculated by using the total mode method. Then,the kinematic equation of multi-floating rigid body was established based on vector mechanics,and the dynamic response is calculated based on geometric constraints to obtain the optimal capture efficiency and the optimal load damping. Finally,the capture efficiency of the multi-floating body of the Starfish wave energy device is compared and analyzed. The results show that the design of starfish wave energy device with multiple floating bodies can broaden the optimal capture bandwidth and improve the capture efficiency of the device. Compared with the way to capture wave energy by the forward and backward waves,in the case of small period,the capture efficiency of forward-facing absorbing wave body is relatively higher. With the increase of period,the capture efficiency of forward-facing absorbing wave body starts to decrease,and the capture efficiency of back-facing absorbing wave body starts to increase. In the case of maximum period,the capture efficiency of forward-facing absorbing wave body and back-facing absorbing wave body tend to be consistent and close to zero.