Abstarct: Seed exhaustion is a harmful and undesirable process in agriculture. This process causes a decrease in seed viability and germination. Today, pretreatment of some compounds can be used to reduce the effects of seed exhaustion. Cinnamic acid as a secondary mextabolite is one of the compounds whose healing properties have been proven in different stresses. Therefore, the purpose of this research was to investigate the effect of pretreatment of different concentrations of cinnamic acid on worn and unworn seeds in both field and laboratory sections. The laboratory part was carried out as a factorial experiment baxsed on a completely randomized design and a field experiment as a factorial experiment baxsed on a randomized complete block design in 3 replications in 2019 in Shahrood University of Technology. The test treatments included seed exhaustion at three levels (no exhaustion, moderate exhaustion and severe exhaustion) and seed pretreatment with cinnamic acid at seven levels: zero, distilled water, 10, 20, 30, 40 and 50 micromolar. Accelerated aging of soybean seeds was done baxsed on existing methods at a temperature of 41 degrees Celsius. The time of 50 hours was chosen as moderate exhaustion and 100 hours as severe exhaustion. Pre-treatment of seeds with distilled water and different concentrations of cinnamic acid was carried out by aerating the seeds for 6 hours. The results in the laboratory section showed that the highest percentage of germination (92.66 percent), germination speed (95.4 hours) was related to the pre-treatment of 40 micromolar cinnamic acid and the highest seedling strength (360.13 mm) was also related to The concentration of cinnamic acid was 20 μM. In the field sector, exhaustion caused a decrease in the number of sub-branches, leaf area index, plasma membrane stability, grain yield and increased anthocyanin, malondialdehyde in leaves, oil and seed protein percentage. Also, pre-treatment with concentrations of 50 micromolar cinnamic acid in exhaustion conditions increased anthocyanin, chlorophyll a, total chlorophyll and seed oil yield. Also, the concentrations of 40 micromolar cinnamic acid and distilled water caused a significant increase in the weight of one hundred seeds and germination percentage. Cinnamic acid also caused a significant increase in the number of sub-branches, leaf surface index, plasma membrane stability, chlorophyll a, total chlorophyll, protein yield and decrease in seed protein in non-exhausted conditions.