This invention discloses using SPR technology to simultaneously and quantitatively measure the concentrations of different liver fibrosis-associated serum biomarkers in a serum sample, which can be used for the diagnosis of liver fibrosis. It also discloses an efficient formula to make a mixed SAM that can greatly enhance the immobilization ability of the metal surface in SPR based techniques, which is good for the immobilization of relevant antibodies used for the detection of liver fibrosis-associated serum biomarkers for the diagnosis of liver fibrosis.