NOVELTY - Preparing wurtzite structure cernyite nano-wire comprises adding cadmium acetate and L-cysteine into a beaker containing deionized water, stirring, drop-wisely adding anhydrous ethylenediamine, reacting in a stainless steel reaction kettle, centrifuging by adding ethanol and deionized water, drying the precipitate to obtain cadmium sulfide nano-wires, adding copper sulfate, nano-wires, stannous chloride and L-cysteine into beaker containing deionized water, stirring, adding anhydrous ethylenediamine, reacting in the kettle, centrifuging and drying.    USE - The nano-wire is useful as an absorbent layer material in solar cell device.    ADVANTAGE - The method is simple, economical and suitable for batch synthesis.    DETAILED DESCRIPTION - Preparing wurtzite structure cernyite nano-wire comprises: (a) adding cadmium acetate and L-cysteine in a molar ratio of 1:(2-3) into a beaker containing deionized water, stirring the mixture for complete dissolution to obtain homogeneous clear solution, drop-wisely adding anhydrous ethylenediamine (volume ratio of water to ethylenediamine is 1:9) into the above beaker under room temperature, continuously stirring for 10 minutes, then transferring the resultant solution into 50 ml stainless steel reaction kettle, reacting at 180 degrees C for 24 hours, removing the high pressure kettle out from heating device, cooling to room temperature, adding ethanol and deionized water as cleaning agent, centrifuging at 8000 rotations/minute for 4 minutes, repeating multiple times until to obtain clarified solution, collecting the lower layer precipitate substrate, drying in an oven at 60 degrees C for 5 hours to obtain cadmium sulfide nano-wires; and (ii) adding copper sulfate, cadmium sulfide nano-wires, stannous chloride and L-cysteine in a molar ratio of 1.7:1:1:(4-5) into a beaker containing deionized water, stirring the mixture for complete dissolution, drop-wisely adding anhydrous ethylenediamine (volume ratio of water to ethylenediamine is 1:9) into the above beaker under room temperature, continuously stirring for 10 minutes, then transferring the resultant solution into 50 ml stainless steel reaction kettle, reacting at 180 degrees C for 24 hours, removing the high pressure kettle out from heating device, cooling to room temperature, adding chloroform, ethanol and deionized water as cleaning agent, centrifuging at 8000 rotations/minute for 4 minutes, repeating multiple times until to obtain clarified solution, collecting the lower layer precipitate substrate, drying in an oven at 60 degrees C for 5 hours.