Background: Small ruminants are known to play a very important role in food security in developing countries such as Iran.Objective: The objective of the study was to identify types and estimate the prevalence of foreign bodies in the rumen and reticulum of involved sheep in the area, and also to evaluate the surgical approach prognosis.Results: Epidemic occurred in northwestern of Iran. After referring two cases with ruminal impaction to Tehran Veterinary Hospital, a precise clinical examination, epidemiology study, and a herd survey were done. Ultimately, surgery was selected to correct the problem. The incidence and mortality of the disorder were recorded 6/25% and 3.3% respectively. The prognosis of surgical approach was estimated 90%. On clinical examination of the ram revealed dullness, dehydration, scanty faeces and slight distension of the abdomen at paralumbar fossa. The number of respiration increased, and breathing was accompanied by groan and difficulty in breathing. The foreign bodies were about 2 kilogram in weight and was comprised of rope and plastic in mixed with feces. Conclusion:It was concluded that large economic losses occur due to ingestion of foreign bodies in sheep. It's conducted that ruminal impaction can result of grazing sheep in polluted pastures with plastics or ropes or other indigestible material or in poor pastures that result in ingestion even the rare foreign bodies. In addition, it was concluded that surgical approach can be helpful in these cases with acceptable prognosis.