Abstarct: Osmotic adjustment is one of the important parts of drought tolerance mechanism in plants. In water deficient, protection with carbohydrates from the cell by osmotic adjustment and maintenance torsesans, and protected the stability of the plasma membrane and proteins. In order to examination of sucrose sucrose and glucose foliar application effects on some agronomic and physiological traits in Nigella sativa L experimental was conducted at the agricultural Faculty of the University of Shahrood in 2013. A spilit plot factorial experiment on the basis of completely randomized block design was carried out in three repetitions.main factor Treatments consisted of two levels of irrigation every 8 days once (no stress) and every 16 days (water deficient steress) as the. and sub-factors were three sucrose foliar application (0, 10 and 20 g/l) and and glucose foliar application time (0, 10 and 20 g/l). Stress treatment was done after the establishment of plants and foliar application carbohydrates 30 days after planting. The results showed that water deficit stress decreased Biomass, Plant height, pods per plant, yield, brancher number, relative water content, stability of the plasma membrane, chlorophyll, protein percentage and grain soluble carbohydrates. Both the Applied of sucrose had significantly effect on all the studied traits. But the concentration of glucose in foliar application characteristics of chlorophyll a to b chlorophyll protein were not significant difference. And the attributes brancher number and, pods per plant, relative water content stability of the plasma membrane in 20 grams per liter with controls showed significant difference and the attributes chlorophyll b and carotenoids were not affected by this treatment.