The invention discloses a nickel-copper composite electroplated hub-shaped dicing blade and application thereof. A preparation method for the nickel-copper composite electroplated hub-shaped dicing blade comprises the following steps of sequentially treating an aluminum alloy matrix with a sodium hydroxide solution, a nitric acid solution and a zinc depositing solution to obtain a surface treatedaluminum alloy matrix, adding a diamond in a composite ion electroplating solution to obtain an electroplating system, adding the surface treated aluminum alloy matrix in the electroplating system, performing electroplating treatment under stirring to obtain a nickel-copper composite electroplated piece, and performing buffing, edging, alkaline etching and chemical polishing on the nickel-copper composite electroplated piece to obtain the nickel-copper composite electroplated hub-shaped dicing blade. In the preparation method, by utilizing the composition ratio, copper ions and nickel ions deposit on the surface of the aluminum matrix at the same time to form a nickel-copper composite plating layer during electroplating, so that the defects that as the hardness of a binding agent is overlarge, the diamond cannot easily fall off in the dicing process to cause the diamond on the surface to be passivated, and the cutting quality is rapidly declined in the prior art.