The invention discloses a continuous preparation method of a
platinum bulk drug, which comprises the following steps: by taking chloroplatinite as a starting material, in a reaction environment of taking water as a
solvent, replacing the starting material with iodized salt to obtain iodoplatinite, and then adding an amine ligand to quickly react to generate an intermediate-cis-diiodo-
platinum-amine complex; introducing the
solid-liquid mixed
system containing the intermediate into a filtering and washing device, filtering and washing, directly discharging the
solid into a reaction kettle, adding silver salt and water, reacting completely, and filtering; and concentrating the filtrate to obtain a crude product of the target product, and recrystallizing the crude product to obtain the
platinum bulk drug. Or reacting the filtrate with a
leaving group (or a salt formed by the
leaving group) of the target compound, concentrating, filtering and washing to obtain a crude product of the target product, and recrystallizing the crude product to obtain the platinum
bulk drug. The production efficiency and quality consistency of the product can be improved, the process amplification flow is simplified, the production cost and
material consumption are reduced,
green manufacturing is realized, and the method is an optimal choice for industrial production of platinum bulk drugs.