This study employs wire-arc direct energy deposition (wire-arc DED) to produce high-strength aluminum alloys on the spinning matrix. Spinning-additive hybrid manufacturing specimens were produced. The evolution mechanism of the interfacial microstructure and fracture behavior of the hybrid manufacturing (HM) specimens was analyzed. The results indicate that the microstructure morphology can be divided into three regions: the spinning zone (SZ), columnar grain (CG) zone of additive manufacturing (AM), and equiaxed grain (EG) zone of AM. The SZ exhibits a bimodal grain structure, while the AM-CG zone consists of epitaxial growth from the SZ, and the AM-EG zone comprises equiaxed grains. Due to the influence of the hot spinning process, a large amount of eutectic structure and η phase coexist in the spinning matrix, resulted in a small amount of undissolved η phase remaining in the spinning matrix after heat treatment. A small amount of η' phase was generated in the AM zone at as-deposited state, due to the effect of in situ thermal cycling of the subsequent additive manufacturing process. Nearly all of η phase which dissolves into the α-Al matrix after heat treatment. The tensile strength of the hybrid manufactured samples increased from 256 MPa in the as-deposited state to 528 MPa after heat treatment. The fine-grained region of the spinning matrix experiences deformation and crack propagation initially, attributed to the softer properties of the fine-grained region within the bimodal grain structure of the SZ matrix, ultimately resulting in fracture at the SZ in all hybrid manufactured specimens.