The invention provides a special high-frequency and energy-saving communication flexible cable for a ship, and relates to the technical field of production of cables. The special high-frequency and energy-saving communication flexible cable for the ship comprises six strands of insulating conductors which are twisted with each other; a lapping layer, an polyolefin inner bushing layer, a tinned copper wire braiding armor layer and a polyolefin outer bushing layer are sequentially arranged outside the twisted insulating conductors; fillers are placed between the insulating conductors and the lapping layer; each strand of insulating conductors comprises a tinned copper wire conductive core wire; and a crosslinked polyethylene insulating layer is wrapped outside each tinned copper wire conductive core wire. The special high-frequency and energy-saving communication flexible cable for the ship is low in smoke, halogen free, flame retarded, corrosion resistant, and interference resistant, and is applicable to telecommunication equipment, electrical instruments, and signal transmission and control systems of various information processing devices in the ship and overwater floating buildings.