The utility model discloses a fan self -lubricate system, including lubricating -oil tank, accumulator, lubricating oil cooler, lubrication oil filter and lubrication points, be equipped with the stopvalve between lubricating -oil tank and the lubricating oil cooler, be equipped with bypass valve I and main valve behind the stop valve respectively, be equipped with bypass valve II between bypassvalve I and the main valve, be equipped with the accumulator behind the main valve, be equipped with the valve behind the accumulator, be equipped with guide shower valve behind the valve, the lubricating oil cooler rear end is equipped with lubrication oil filter, the lubrication points has been connect behind the lubrication oil filter. Sensitive, the nos mechanical friction loss of this systemresponse, in, can all adopt among the low pressure lubricating oil system this kind of accumulator as lubricated in the twinkling of an eye or short time pressure compensator, provide the continuity lubrication for the lubrication points.