The current water conservation forest in the upper stream area of the Miyun reservoir of Peking City is analyzed.The forest types and present condition are considered.The effects on river flows of Pinus tabulaef ormis wood,Robinia pseudoacacia wood,chestnut wood and mixed forest are considered.The effect of deadwood leaves on the absorption of rain,woodland soil water storage capacity and overland flows and the purification of water as it moves are considered.The result reveals that use of water increases according to the order:Pinus tabulaef ormis forest