A quantitative economic evaluation method for ecological benefit of garden afforestation was established by incorporating the model of leaf-area about thirty-seven species plant,the physiological characteristic measure of plant including net photosynthesis rate,transpiration rate,dust retention,and the research on economic evaluation index system and relevant method.This quantitative economic evaluation method for ecological benefit includes absorbing Carbon Dioxide,releasing Oxygen,increasing humid and fall temperature,dust retention of plant at eight district in Beijing.Also,in order to enhance manipulate efficiency and simply professional operation procedure,regarded Access database as parameter source,the system about evaluation on ecological benefit of garden afforestation and relative economy evaluation were developed by applying Visual Basic software.
