Abstract: Purpose/Significance The accounting system is mature and mature along with the development of production practice activities. Due to major changes in production methods, the accounting system should be changed accordingly. Traditional cost accounting mainly analyzes products as accounting objects, and it is easy to ignore the importance of time. Design/Methodology Based on this, by analyzing the problems existing in the current accounting, on the basis of the time value of funds, the paper analyzes the effect of increasing the turnover rate to reduce the capital occupation and improve the capital return rate. By analyzing the shortcomings of calculating the capital turnover rate of total assets in the DuPont model, it is pointed out that the fixed asset intervention asset turnover assessment weakens the direct contribution and value of current assets to profits, and weakens the contribution of current assets turnover to capital return. Findings/Conclusions Therefore, a lean management accounting model was constructed from the perspective of the company’s operation and management, which made up for the defect that the value stream map had nothing to do with profits, and provided a new theoretical basis for the company to eliminate waste, promote cost improvement, and improve the return on capital.