Construction method of deep oil tank area of container ship

The invention discloses a method for constructing a deep oil tank area of a container ship, which comprises the following steps of: dividing the deep oil tank area into six blocks, namely a main deckblock UD, a larboard block DP, a starboard block DS, a left bottom block BP, a right bottom block BS and a fuel oil tank block FD; taking the left bottom block BP as a reference block, and normally placing the left bottom block BP on the cement placing pier; placing the right bottom block BS in a normal state and folding the right bottom block BS with the left bottom block BP; then hoisting the fuel oil tank unit FU to a closing section of the left bottom block BP and the right bottom block BS, and closing the fuel oil tank block FD with the left bottom block BP and the right bottom block BS after hoisting is finished; respectively hoisting the larboard block DP and the starboard block DS to be combined with the previously hoisted block; hoisting an outfitting unit WU of the sewage treatment chamber after the uppe