The invention provides a special combined high-strength cable for naval ships, comprising an inner protective pipe. Two combination parts are evenly distributed along the circumferential direction inside the inner protective pipe. The combination parts are strip structures with semi-circular sector-shaped cross sections. A conductor is embedded into the middle of each combination part along the length direction. Plugging slots are symmetrically formed inward in the two sides of the middle plane. The plugging slots are arranged along the length direction of the combination parts, and the crosssections thereof are T-shaped. Two plugging connectors are installed in a matching manner between the two combination parts. The plugging connectors are strip structures, and the cross sections thereof are I-shaped. Arc grooves are formed along the circumferential direction in the outer arc surfaces of the combination parts, and the arc grooves are evenly distributed along the length direction ofthe combination parts. The two combination parts are fixed by cable tapes which are wound in an arc grooves. The outer side of the inner protective pipe is sleeved with a fire-proof pipe, a waterproofpipe and an outer protective pipe in turn. The beneficial effects are as follows: the strength of the cable is improved; and through a unique combined design and the plugging connectors, the stability after combination is ensured.