The invention discloses a manufacturing method for a 
superstructure block of a roll-on-roll passenger ship. The method includes that following steps: step S100, dividing the 
superstructure block intoa plurality of 
deck subblocks and outer plate subblocks on both left and right sides; step S200, manufacturing the 
deck subblocks, providing plates required for the 
deck subblocks, carrying out automatic marking, assembling and 
cutting the remaining amount on the plates on a thin plate plane subblock 
assembly line, to form a deck surface at one time, and installing longitudinal bones and T-shapedmaterials on the deck surface, to form the deck subblocks; step S300, manufacturing the outer plate subblocks, providing plates required for the outer plate subblocks, carrying out automatic marking,assembling and 
cutting the remaining amount on the plates on the thin plate plane subblock 
assembly line, to form the outer plates at one time, and installing longitudinal bones and T-shaped materialson the outer plates, to form the outer plate subblocks; step S400: lifting the deck subblocks in the middle from bottom to top in the 
assembly stage of the 
superstructure block, and then lifting theouter plate subblocks on the left and right sides. Each subblock of the superstructure block of the roll-on-roll passenger ship is simple to manufacture, reasonable in subblock division and short in construction period.