Disclosed is a quantum dot precursor synthesis device, comprising a precursor reaction region, which comprises at least one spiral reaction tube. A path groove which extends in a direction opposite to the spiral shape and enables reactants injected into the reaction tube to generate a bubbling effect through friction is formed on the inner wall of the spiral reaction tube; a heating region covers a front section of the precursor reaction region; a cooling region covers a rear section of the precursor reaction region; a plurality of injection openings are formed at the front end of the precursor reaction region; the front end of the core/shell reaction region is connected with a pressurization device. Also disclosed is a quantum dot precursor synthesis method. The quantum dot precursor synthesis device in the present invention is simple in structure and reliable; by forming a path groove on the spiral reaction tube, reactants can be stirred; the passing time of the reactants in the spiral reaction tube can be controlled by regulating the inner diameter and the length of the spiral reaction tube with regard to different kinds of precursors to be synthesized, so that precursors of high quality can be obtained.
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