An electrochemical enzymatic biosensor is based upon the characteristic of an enzyme capable to recognize a particular molecule through an oxidation-reduction effect. In this study, the Glutamate oxidase is utilized as the sensing components of our sensor system to initiate biological and subsequent electrochemical reactions. The characteristic current-time curves are fairly interpreted using three types of calculation models including end-point measurement, quasi-kinetic measurement, and quasi-kinetic measurementⅡ. The end-point measurement is adopted in this study. For the purpose of ezyme-immobilization, polyvinylpyrrodine is utilized to embed HRP、K3Fe(CN)6, and Glutamate oxidase on the screen-printing electrode to prepare the HRP/K3Fe(CN)6/GMOx/SPE chemically modified electrode. The optimal substrate composition for the determination of GOT activity is 1mM