Objective A new Continous-monitoring. Methods Determinating adenosine desaminase was established,and its experiment conditions including pH,substract concentration et al,and methodological performance were investigated.In this study,Two reagents were used,reagent one including 6 mmol/L α-ketoglutarate acid,0.35 mmol/L NADH,0.8 mmol/L ADP,0.1 mmol/L EDTA-Na2,1000U/L glutaic dehydrogenase.Reagent two including 12 mmol/L adenosine.Results The linearity range of this method can reach 97 U/L,the variance within batch and between batch were 4.9% and 6.53% respectively.Correlation analysis showed there was significant correlation between ours and Berthelot′s method.Conclusion The continous-monitoring method is accurate,simple and easy to be used in clinic.