The streptavidin-biotin (SA-Biotin) system has a very high binding affinity (Kd=10^-15) and is widely used in the biological field. The product uses protein coupling technology to covalently connect SA to the surface of solid phase carrier, which can efficiently bind biotinylated antibodies, nucleic acids, proteins and other ligand molecules. This product uses superparamagnetic microspheres, which facilitate easy and fast capture of target molecules and magnetic separation. This product can be equipped with automated equipment for high throughput operation.