The invention discloses a conveying chain and a manufacturing technology of the conveying chain. The conveying chain comprises a plurality of chain units which are sequentially connected in an end-to-end mode, and each chain unit comprises a middle chain plate and two side chain plates located on the two sides of the middle chain plate, wherein containing grooves capable of loading and containing workpieces are formed between the middle chain plate and the side chain plates, and the middle chain plate and the side chain plates in each chain unit are made of silicon nitride materials and silicon carbide materials in a combined mode. The conveying chain is simple in structure and manufacturing technology, has high strength, high hardness, high abrasion resistance, high-temperature resistance, good inoxidizability and heat shock resistance, has the good performance of quenching and quick heating resistance and high-temperature creep resistance, can be suitable for environments of different heat processing technologies in the heat processing process, can be used in a heat processing furnace to convey the workpieces to be heated, is long in service life, and can effectively reduce the production cost for heat processing.