This invention is related to a peptides mixture. Without the need to consider the patients' genetic background, it can interfere with MHC-pathogenic peptide-TCR formation, which includes the interference with pathogen peptide binding with MHC and pMHC binding with specific TCR, suppression of the immune synapse formation when the specific T cell immune response occurs, reduction of the number and density of the MHC-specific immune response mediated pathogenic peptide-TCR in the immune synapse, and suppression of the highly activated signal transduction in the immune synapse. Hence it can negatively regulate the T cell specific immune response, reduce the specific immune cell activation, proliferation and effect, and make the radical T cell specific immune response more stable and last longer. It can be used to treat diseases with excessive T cell-specific immune reaction, such as severe flu, SARS, hand-foot-and-mouth disease, viral pneumonia, bacterial infections, severe autoimmune disease and etc.