Abstract: In order to better and more intuitive assessment of the nature reserve of natural capital, the introduction of cash flow as a research starting point, by nature reserve reflects the value of cash flow is divided into two parts and non-cash flow assessment of the nature reserve model, the development of nature reserve status quo analysis, the prospects for the development of more accurate forecasts.Portion of cash flow measurement part of the available cash, including capital gains and capital expenditures, capital revenue sources are mainly nature reserves products, services and derivatives operations of the income generated; capital expenditure is mainly used for the construction of protected areas, protected area management costs, the residents of the surrounding ecological compensation of protected areas of artificial interference of expenditure. Non-cash flow section of the part can not be measured in cash, including the nature reserve of the soil and water conservation, sand-fixing, regulating water, purifying water and other natural and cultural heritage.