Abstract: The correlation between six agronomic traits(plant height,stem number,industrial length of fiber,primary branches number of main stem,capsule number per plant,grain number of each capsule)and plant yield were analyzed in this paper.The contents were measured for the soluble sugar,linolenic acid and oil of seeds of foreign flax varieties(FR-46 and FR-48)and domestic flax varieties(Neiya7).The results showed that agronomic traits of three varieties were relatively stable and plant yield had significant positive correlation with capsule number per plant of each variety.Soluble sugar content of after-ripening of seeds decreased,but linolenic acid content and fat content increased.The linolenic acid content of FR-48 was higher than FR-46 and Neiya7 significantly.