The utility model discloses a ships and light boats 6 -degree of freedom motion testing device. It includes motion platform, and what the motion platform top set up is solid device, and the pneumatic cylinder more than six that the motion platform below set up still includes the main control computer and ships and light boats motion simulation system that is connected with the main control computer and the pneumatic cylinder controller of being connected with the main control computer, and the pneumatic cylinder controller is through the hydraulic cylinder drive headtotail of DA card and pneumatic cylinder, and the pneumatic cylinder controller can be with data information transmission for the hydraulic cylinder drive system. After adopting foretell structure, can develop real dress and model experiment effectively, transport to equip and load and be solid scheme, aspects such as military equipment water transport nature, civilian boat military transportation repacking scheme etc. Experimental, detect, also can carry out the crewman simultaneously, land the anti dizzy training of soldier and experimental etc. The test result precision is high, has reduced manpower and materials that ship trial traditionally consumeed and financial resources, has the characteristics that test duration is short, the risk is little, the reliability is high.