Based on field investigations and by using the expense payment method, travel cost method (TCM) and contingent valuation method (CVM),the tourism value of biodiversity in Changbaishan Mountain Biosphere Reserve (CMBR) is evaluated in this paper.The tourism value is considered as the sum of the tourists' trave l cost,consumer surplus,time value and other expenses.To calculate the consumer surplus,the TCM technique,popular in some western countries,is used.By dividing the country into small geographic sub regions and carrying out on site samplin g investigations of 3 131 visitors,the visiting rates of the tourists from the s tarting sub regions to CMBR are calculated,a regression model between the visit ing rates and the variables such as population,incomes,travel costs,and travel t ime of the sub regions,and a supply demand curve is established and the consum er's surplus of all the tourists is thus figured out.The results showed that in 1996,the total tourism value of biodiversity in CMBR reached 432 million yuan,o f which domestic tourism value was 137 83 million yuan and international touri sm value,294.2 million yuan.