The invention provides a ship capable of quickly and safely retracting and deploying a child ship. The ship comprises a mother ship and the child ship, wherein slideways and a main hanging rod are arranged on the mother ship; the slideways are positioned at the tail part of a cabin of the mother ship; the main hanging rod is positioned in the middle of the mother ship; the slideways are used for placing the child ship; the length extension directions of the slideways are intersected with the length extension direction of the main hanging rod; the included angle of the length extension direction of the slideways and the horizontal base line is 30-60 degrees; a slideway surface is arranged at the bottoms of the slideways; the slideways and the slideway surface are parallel; a first T-shaped material supporting rack is arranged at the bottom of the slideway surface in the longitudinal direction of the slideway surface; openings at the tail end of the slideways are reversed round angles; a pulley block is arranged on the main hanging rod, and comprises hanging hooks.