The invention provides a method for preparing baseball bat-shaped Cu2S (Copper sulphide) nano-wires by a chemical vapour deposition method. The method comprises the following steps: respectively placing cuprous oxide and sulphur powder in a high-temperature region and a low-temperature region of a chemical vapour deposition device, stacking and horizontally placing a SiO2/Si substrate above a copper source, and sealing two ends of a quartz tube; introducing a protective gas into the quartz tube for 5 to 10 minutes for exhausting air; turning on a tube furnace heating switch, simultaneously, heating the low-temperature region to 300 DEG C, heating the high-temperature region to 700 to 800 DEG C, insulating heat for 10 to 20 minutes, turning off the heating switch, and cooling to the room temperature to obtain Cu2S nano-wires with uniform sizes on the SiO2/Si substrate. The baseball bat-shaped Cu2S (Copper sulphide) nano-wires prepared by the method are of a multi-level structure; a Cu2Sbaseball bat shape consists of a sphere and a longer conical cylindrical Cu2S nano-wire; the prepared nano-wires are uniform in morphology, and can be applied to the fields, such as photoelectric detectors, lithium ion batteries and photocatalytic materials.