In order to screen beneficial Staphylococci for meat products fermentation, 54 strains were selected from fermented meat products by streaking separation. Based on the salt tolerance of the strains and 16S DNA sequencing results, 8 strains of salt-tolerant Staphylococci were selected for plasma coagulase test. Six strains were identified as coagulase negative. The extracellular protease of coagulase negative Staphylococci were incubated with muscle protein for 20 h to analyze the degradation ability of muscle protein. The experimental results showed that 6 strains of staphylococcal extracellular protease had certain degradation ability to the protein strip at 250 ku of sarcoplasmic protein, but it didn't have obvious degradation effect on myofibrillar protein.