Based on the DuPont financial analysis system, this thesis studies the profitability of China Mobile. In the process of modern enterprise operation and management, financial analysis can provide corresponding data reference for enterprise operation and development, so that enterprise managers have a better basis for making decisions. For enterprise managers, in order to improve the level of business development, improve management capabilities, play the effectiveness of business decision-making, and improve the core competitiveness of enterprises in the market, can not be separated from the scientific financial analysis methods.