This paper employs an Input-Orientated DEA method to investigate the technical efficiency and efficiency change of Chinese state-owned commercial banks during 1994-2001.We decompose the technical efficiency into pure technical efficiency and scale efficiency, identify the technical efficient and inefficient banks, and determine the return to scale of the banks. According to the average estimator of technical efficiency we investigate the overall efficiency trend of the state-owned commercial banks, and conclude that the technical efficiency of Chinese state-owned commercial banks is very low during the periods of Asian finance crisis, as accords with the facts of the time; in addition we predict the future trend of the state-owned commercial banks and analyze the cause.