Method for clearing marine fouling organisms at hull bottom

The invention discloses a method for clearing marine fouling organisms at the hull bottom. Temperature-adjusting pipelines are laid on the inner side of the hull bottom in the longitudinal direction of a hull; the temperature-adjusting pipelines are divided into two kinds, namely, the heating pipelines and the freezing pipelines, and the heating pipelines and the freezing pipelines are arranged atintervals; and the freezing pipelines are connected with a refrigerating machine, and the heating pipelines are connected with a ship heat pipe condenser. When the fouling organisms adhered to the hull bottom need to be cleared, the refrigerating machine is started firstly, the hull bottom is subjected to temperature decreasing and freezing through the freezing pipelines, thus the fouling organisms adhered to the outer side of the hull bottom are frozen, then the refrigerating machine is shut down, a switch of the ship heat pipe condenser is turned on, the hull bottom is heated through the heating pipelines, and thus