Abstract: A halophilous protein degradation bacterium K- 1 was isolated from restaurant wastewater by salt tolerance test and fermentation test.The effect on K-1 growth of salt ratio, pH and salt species were investigated.Results showed that: Based on morphologic observation, biochemical characteristic and identification of 16SrDNA, K-1 belonged to the genus of Acinetobacter, which showed a ratio of protein degradation as high as 68.82% at20℃ with 2% salt.The strain could grow even with 10% NaCl's addition, and the optimum pH for bacteria growth was 6.5. The medium of Mg2 +and K+were neither promoting nor inhibiting the growth of K-1, Ca2 +could inhibit the growth of strain.