This paper analyzed the physiological characteristics of Brassica napus and its eco-climate condition in Linxia of Gansu Province by using the mathematical statistic method,and established the comprehensive index system of suitable planting area of Brassica napus.The precipitation,temperature and sunshine hours were main factors influencing Brassica napus growth by analyzing climatic factors during Brassica napus growth season from 1971-2009 in Linxia area.At the same time,the Brassica napus planting area w...