Abstract: China is developing from productive society to consumption-oriented society, China's economy is transforming from investment-driven to consumption-driven, and the goal of China's economy is changing from high-speed development to high-quality development. In transformation process of China's economy and society, the economic growth rate is also slowing down year by year. Based on the Solow-Swan growth model, it is found that when the economic development changes to consumption-driven, it will inevitably lower the economic growth rate. At present, the slowdown of economic growth rate in China accords with the basic laws of development. Economic restructuring should not be abandoned because of the downward pressure on economic growth. China's economy should develop to high quality:firstly, we should expand domestic demand and continue to promote the adjustment of our economic structure, and increase the proportion of consumption in GDP; Secondly, we should actively deal with the problem of aging, take effective measures to increase the number of people in work, avoid a large decline in the number work people; thirdly, we should increase the investment in R & D of science and technology, encourage social innovation, and promote technological innovation.

Key words: consumer economy, structural adjustment, economic downturn, growth model