The congestion of production factors is refer to the“jam2up”of production and the decrease of output during one or more production factors is increased to some extent of overabundance relatively. The production con2 gestion occurres if there are dormant assets according to theoretical analysis. In this paper the non2parametric ap2 proaches based on the theory of production frontiers is used to measure the static and dynamic status of production congestion of Chinese industries during the transition period 1992 —1998. The result supports the assumption that production congestion exists usually. The impact of congestion is the key reason of the fluctuation of industrial effi2 ciency and productivity in China.