Neodymium (Nd)-based homogeneous rare earth catalyst as well as preparation method and application thereof

The invention relates to a novel neodymium (Nd)-based homogeneous rare earth catalyst as well as a preparation method and application thereof in conjugated diene polymerization. The synthesis method of the catalyst is simple and easy to control, and the homogeneous and stable catalyst with high activity can be obtained by utilizing the method. By utilizing the Nd-based homogeneous rare earth catalyst, a conjugated diene polymer can be synthesized, wherein, the cis-structure content of the polymer is more than 98%, the weight-average molecular weight of the polymer can be adjusted within the range of 1,000,000-2,500,000, and the molecular weight distribution (MWD) ranges from 3.0 to 4.0; and the polymerization process is stable and easy to control, thus being applicable to continuous technological operation.