In this paper the site factors influencing the growth of Acacia aurlculiformis were screened on the basis of the data collected at sample lots in different areas of Guangdong province by the method of step regression. These site factors were divided into three site type groups and each group subdivided into four site types by fuzzy classification and they evaluated. Results show that site types No. 1,2,5,6,7,9,10 were good for its planting. Types No. 3 and4 were seriously deficient in potassium. Types No. 8 and 11 needed more intensive planting. type No. 12 was not suitable for planting Acacia auriculiformis.