This book will use the theory of economic growth, taking the optimal consumption rate as the main line, and through theoretical model analysis, explore the conditions for the economy to meet the optimal consumption rate, the possible evolution path of the consumption rate with the economy, and the steady consumption rate of the economy. The relationship of optimal consumption rate. Through empirical analysis, the relationship between the dynamic economic efficiency and the optimal consumption rate is used to define the optimal consumption rate of the Chinese economy, and data from 31 provinces in China are used for further analysis. Based on the parameter calibration, this article uses the Solow model, Ramsey model, general equilibrium model under open economic conditions, and DSGE model to simulate the optimal consumption rate of the Chinese economy and analyzes its influencing factors. Based on the study of the optimal consumption rate, it proposes countermeasures and suggestions for expanding consumption demand. <<