Abstract: The offshore structure includes the offshore drilling platform, oil and gas exploitation platform, FPSO, the submarine pipeline and the large oil tank, etc. The offshore structure is affected by the severe ocean environment (such as the wave, ocean current, windstorm, the frigid sea ice) and suffered the biofouling and the ocean corrosion. The tribological problems of the offshore platform structure, fluid handling and transporting equipment, the locator device and operation equipment were discussed in this paper. The tribological characteristics of the marine equipments (such as the offshore platform structure, the pipeline system and sea water pump, the mooring chain and propeller, the well casing and electric submersible pump) were presented. The overseas and domestic research status about the tribological problems of the marine equipments were summarized, the main tribological problems of ocean structure were prospected and presented in the paper.