The present invention relates to a manufacturing method of cladding composite additive production line, including the following steps: S1, parallel multi-station, according to the data model, process silk / powder material raw materials through multi-axis numerical control platform equipped with laser and arc additive system forming a cladding; S2, pouring the molten liquid metal into the cladding, and then casting the molten liquid metal into shape; S3, connecting multiple stations in parallel, forming a cast solidified structure when the molten liquid metal is cooled to a semi-solid or forging extrusion temperature, Then extrude or forge the solidified structure of the casting; S4, parallel multi-station, heat-treat the composite formed blank; S5, parallel multi-station, machine the blank into parts; S6, parallel multi-station Station, remove the substrate or cladding; S7, parallel multi-station, inspect the parts; S8, parallel multi-station, after passing the inspection, the finished parts go out of the line and packaged. The invention belongs to the technical field of composite material additive manufacturing.