Abstract: Taking 205 individuals of Ginkgo biloba L.as the main research object,and the ornamental characters of 205 individuals of Ginkgo biloba L.in Beijing city were investigated and counted.Four evaluation criteria like tree shape（A1）,branch shape（A2）,leaf shape（A3）,leaf color（A4）and16 evaluation factors were selected to establish the evaluation system of ornamental characters of Ginkgo biloba L.in Beijing city,and then divided the ornamental grades of 205 individuals of Ginkgo biloba L.in Beijing city,in order to provide theoretical guidance and reference for the future application of Ginkgo biloba L.in landscaping and the breeding of ornamental varieties.The results showed that among the total ranking values,leaf color（A4）had the largest weight and had the largest binding force on the ornamental value of GinkgobilobaL.;among the 16 evaluation factors,leaf color（B14）,leaf color stage（B16）and leaf base shape（B11）were the main indexes affecting the ornamental value of Ginkgo biloba L..This research proved that was scientific,reliable and practical to establish a comprehensive evaluation system for ornamental characters of Ginkgo biloba L.in Beijing city by using AHP.