Abstract: In this article, a twpsector model is constructed that embodies comparative advantage, in an attempt to digging out the endogenous impetus of the rapid growth of service industry The equilibrium analysis indicates that making full use of the comparative advantage will make the service industry improve synchronously with or even exceed the growth rate of that of manufacturing industry And the appearance of the production service industry increases the capital comparative advantage of the manufacturing Hence, if the respective comparative advantages of the two sectors are similar, the appearance and development of the production services may increase the growth rate of the manufacturing industry

Key words: serviceindustry, productionserviceindustry, comparativeadvantage