This experiment conducted at 8/10/2018 to 10/12/2018 by using 16 lambs. The weights of the lambs between (26.64 ±0.47) Kg and the ages between (6-7) mounths, to study the effect of Oral dosage with different amount of linseed oil (LO) on some physical and biochemical blood parameters of Iraqi Awassi lambs. The experiment done by four levels of linseed oil (0%LO) (0.25%LO), (0.5%LO), (0.8%LO) ml\kg Dry matter and the hay was freely introduced. and by four treatments each of them consists of 4  lambs. The results showed high significant differences (P ≤0.01) in the fourth treatment compared with the first treatment in the concentration of hemoglobin, Hematocrit, number of Red Blood Cells, number of white blood cells, Mean Corpuscular Volume and Mean Corpuscular Hemoglobin (  9.81 dl / mg, 36.84%, 6.06 × 10⁶ , × 4.29 × 10³ and 53.71 FI) respectively. while the results showed a significant increase (P≤0.05) in Mean Corpuscular Hemoglobin. The results of biochemical tests showed at the beginning of the experiment that there were no significant differences between the treatments in the concentration of triglycerides, but there was highly significant (P≤0.01) decrement at the middle and end of experiment. As for the total blood protein, although there was no significant difference in its concentration at the end of the experiment, it was noted that there was a high significant differences at (P≤0.01) in the concentration of albumin and globulin middle and end of the experiment.