Abstract: The systematic studies of the family Pinaceae Lindl. is made by means of cluster analysis based on 36 systematic characters. The results indicate that the family is divided into three subfamilies:Subfam.Pinoideae:only one genus:Pinus Linn.; Subfam.Laricoideae Melchior & Werderm. emend. N.Li et L. K. Fu.:includes four genra:Cathaya Chun & Kuang, Larix Mill., Picea A. Dietr., Pseudotsuga Carr; Subfam. Abietoideae Pilger, emend. Frankis:include five genra:Abies Mill., Cedrus Trew, Keteleeria Carr., Pseudolarix Gordon, Tsuga Carr.The inter-generic evolutionary relationships in the family is also studied by means of cladistic analysis based on 20 polarizing data, taking geologic time as a longitudinal coo rdinate, a dendrog ram showing the probable phylogenetic relationships of the family is presented in this paper.

Key words: Pinaceae, Systematics, Cluster analysis, Cladistic analysis