Provided is an industrial preparation method for a high-purity dicycloplatin needle-like crystal, comprising: mixing and reacting carboplatin and 1,1-cyclobutane dicarboxylic acid and water, crystallizing same to obtain a dicycloplatin needle-like crystal with a yield of more than 85%, and a utilization rate of the precious metal platinum of more than 97%. The method is green and environmentally friendly and is suitable for industrial production.