Abstract: Using the average effective seed yield of per tree and the 3－year－old mean height of open－pollinated families in seed orchard as judging factors ,87 clones in masson pine seed orchard were evaluated by means of fuzzy comprehensive judgement. When the ratio of being selected is 60%,comparied with the current seed orchard, the gain of the 3－year－old average height of families in 1.5 generation seed orchard could be 27.17% and 3.11% respectively.