Tugboat applied to liquefied natural gas ship and operation method of tugboat

The invention discloses a tug applied to a liquefied natural gas ship and an operation method thereof.The tug comprises a ship body and a plurality of combustible gas detectors, the ship body is provided with a mechanical auxiliary cabin, the left side and the right side of the mechanical auxiliary cabin are each provided with a flue and a fan chamber, the flues are suitable for discharging hot gas, and the fan chambers are suitable for forcibly supplying air to dissipate heat or discharging the hot gas; the flue is provided with a first valve, and the fan chamber is provided with a switch door; the combustible gas detectors are arranged on the left side and the right side of the ship body respectively, the first valve and the opening and closing door on the left side are closed according to fuel gas detection signals of the combustible gas detectors on the left side, and the first valve and the opening and closing door on the right side are closed according to fuel gas detection signals of the combustible ga