The invention relates to a compound oblique insertion assembly welding machine which comprises a wire wheel, a wire insertion frame, a spot welding machine, a driving chain, an electrical control system and a net frame project, wherein the wire wheel, the wire insertion frame, the spot welding machine and the driving chain are electrically connected with the electrical control system; the spot welding machine is located at the lower part of the wire insertion frame; the driving chain is located at the periphery of the spot welding machine and the lower part of the wire insertion frame; and the net frame project is in a framework structure which is horizontally arranged and used for supporting the whole instrument. By adopting the structure, two types of plates for dense insertion or sparse insertion can be produced, the stability and reliability are high, and the service life of equipment is long.