Abstract: The yield contribution of the agronomic characters could be a guide for breeding selection.31 plant lines from linseed F4 were investigated on 7 main agronomic characters.The correlation analysis showed that 4 pairs of characters had reached significant level in F4.The principle component analysis selected 5 main contents in F4 that contributed 85% genetic information. In F4,stem number, ball number per plant and seed weight per plant were preferred the higher the better in selection, while seed number per ball and nlant height were moderate.