Immaterial product production sectors are one of important components of non-financial sectors and have important influence on economic growth and employment of the United States. In recent years，capital accumulation and output in immaterial product production sectors of the United States are increasing，however，there is a problem in low growth efficiency behind this kind of increase. Analysis shows that the main cause for the decline of capital profit rate in immaterial product production sectors of the United States during 1990-2011 results from the increase of their capital organic composition and the decline of surplus value rate，meanwhile，it is proved that the calculation method by using capital value composition change rate to substitute capital organic composition change can cause wrong conclusion，as a result，the United States should use the methods such as product diversification strategy，tax reduction，raising the production efficiency of fixed capital，reducing labor cost and so on to change the tendency of profit rate decline in immaterial product production sectors.