Recombinant antibodies (also known as genetically engineered antibodies) are antibody molecules expressed using DNA and protein engineering technology to process and transform immunoglobulin molecules at the gene level, reassemble them, and introduce them into recipient cells. Recombinant antibodies can address the human rejection reactions caused by animal-derived antibodies, facilitate the humanization of antibodies, and improve their effectiveness. Compared with traditional monoclonal and polyclonal antibodies, recombinant antibodies offer unique advantages and are widely used in scientific research, immunodiagnosis, and as therapeutic antibodies.