Abstarct: Using available and natural materials to achieve better plant growth in the presence and absence of drought stress is one of the environmentally friendly solutions to increase plant production. baxsed on this, an experiment was conducted in the form of a factorial split plot baxsed on a randomized complete block design with 3 replications in the nursery of the Shahrood Department of Natural Resources and Watershed, located on the Shahrood-Bastam highway, on the cowpea plant Vigna unguiculata. The factors of the experiment included irrigation cycle and use of sugar beet molasses in the soil and spraying of sugar beet molasses on the leaves. The levels of the factors of this experiment were 8 and 16 days of irrigation (main plots) and the use of zero, 50 and 100 liters per hectare of sugar beet molasses (subplots). The results showed that the effect of all or some of the investigated factors on the studied traits was significant. The weight of one hundred seeds was not affected by any of the treatments. In most cases, the interaction of three factors was significant. The height of the plant under the condition of 16-day irrigation period (severe stress) had a significant decrease of 50.68% compared to the normal irrigation period. Also, this trait led to an increase of 11.90% in the conditions of application of sugar beet molasses in the form of soil from zero to 100 liters per hectare. The trait of chlorophyll a also increased by 15.38% in the condition of sugar beet molasses foliar spraying in the condition of 100 liters per hectare compared to the control. The addition of molasses caused a significant increase in the amount of chlorophyll a, superoxide dismutase enzyme, pod length, number of seeds per pod and number of pods per plant. Drought stress during the 16-day irrigation cycle decreased the height of the plant, the number of pods per plant and increased the enzymes ascorbate peroxidase, guaiacol peroxidase, carotenoid, harvest index, biological yield and seed yield. In general, it can be said that the results of this study showed that the application of molasses in foliar spraying conditions was effective in reducing the effects of irrigation stress and improving growth in stressed and non-stressed conditions compared to the type of soil used in the bean plant. The best in this research was related to 50 liters per hectare of sugar beet molasses.