Provided is an offshore sunken pile accurate positioning operation method. The offshore sunken pile accurate positioning operation method comprises the steps that (1) a first foundation pile is installed through GPS positioning in a driven mode; (2) a holder base which can carry out 360-degree rotation is installed in the center of the pile top of the first foundation pile, three laser distance measuring sensors which are arranged on the same plane and are parallel to one another are installed on the holder base, and lasers emitted by the laser distance measuring sensors are located on the same plane and are parallel to one another; (3) the actual position of a second sunken pile is found out through the three laser distance measuring sensors arranged on the first foundation pile, and the second sunken pile is installed in a driven mode; (4) the actual position of a third sunken pile is found out through the three laser distance measuring sensors arranged on the first foundation pile and three laser distance measuring sensors arranged on the second sunken pile, and the third sunken pile is installed in a driven mode; (5) accurate measurement of sunken piles in the whole engineering region is accomplished in an alternate mode. According to the offshore sunken pile accurate positioning operation method, real-time and accurate positioning can be carried out on the positions of the sunken piles, and site operators can have timely and accurate control over the positions of the sunken piles.