Small-scale wave floats are widely used in the field of sea wave power generation engineering and ocean buoy structures.Under the action of waves,they usually produce vertical,rolling and longitudinal motion characteristics.Based on the 6-RSS parallel mechanism,a device for simulating the motion of wave floating body was designed to shorten the development period and reduce the cost of sea test.Based on MATLAB/Simulink,the inverse position solution model of the mechanism was established.And the curve of rotation angle of drive steering gear under specific position was obtained by theoretical derivation.Based on the similarity criterion of fluid mechanics,the laboratory model of wave floating body was established,and the hardware circuit of the control system was constructed by using PROTUES single chip microcomputer circuit simulation tool,and the track motion of the platform was realized by linear interpolation operation.By setting up the experimental platform of mechanism rolling motion and mechanism pitching motion,the correlation error analysis was carried out,and the feasibility of the parallel mechanism to simulate the motion of wave float was verified.