This paper uses a panel data of 31 provinces over the period 1998-2003,and applies the stochastic production frontier function on Cobb-Douglas production function to investigate the efficiency of Chinese regional innovation systems.The Empirical results suggest the average efficiency was increasing steadily in the past six years,though the average efficiency is low;at the same time,the difference of efficiency among east-coast area,middle area,west area is obvious.Thus how to improve the efficiency of regio...