Sub-Sahara continent countries as well as African country area measure severely food insecure rely upon rain-fed agriculture for economic system and food security. Global climate change extraordinarily affects farmersâ€™ crop and livestock production, significantly within the arid semi-arid areas. Flood has the end result of global climate change it's exposures to several individuals internal displacement, disease, destroyed infrastructure, food security issue, and psychological impact everywhere the world in Ethiopia country in line with the state disaster risk management report September 2020 G.C 1,017,854 individuals area people affected 292,863 individuals area people displaced across the country. The methodology of this study used a mixed approach descriptive and explanatory analysis style through victimization acceptable activity tools. Complete of 333 households were designated for the study from the overall range of households or respondents, 333 questionnaires (sample size) area household distributed to the beneficiary however 310 questionnaires were collected or came back to the researchers and therefore the remaining was uncollectable in different reasons. The data was collected using questionnaires and interviews as well as secondary data. The data was collected using questionnaires and interviews as well as secondary data. This study assessed the inundated watercourse flood and its impact on pastoralist food security in Amibara woreda, Zone 03, Afar Region, Ethiopia. Ethiopian pastoralistâ€™s area component mainly poor and lack financial gain the most reason there's no various financial gain solely depends on livestock living inside food insecurity out of the population. Ethiopian pastoralists estimate 14-18 % (12 million to fifteen million) indicates current literature. The studies reveal the intensity and impact of flood hazard within the study area and therefore the influence of pastoralistâ€™s household food security standing high 85 % of the participated result have food insecure the remaining 15 % household food secure, food consumption score outcomes 29% there have been poor consumption, 50.50% were borderline consumption whereas the remaining who has 20.50% was acceptable consumption severally the study area unit has low food consumption score this outcome illustrates the pastoralist has lower financial gain exposed to food insecurity they canâ€™t win WFP goal, coping strategy represents very sever 5.1%, less severe 27.3%, sever 56.3% and 11.3% of the household have Quite sever most of the respondents household severely affected by food shortage they canâ€™t simply recover from natural hazard, and downfall knowledge analysis fall and stream flow rate trend occur summer season (June, July, and August) higher as compared to a different season. The outcomes of the analysis area unit the stakeholders as well as government and non-governmental organizations would like careful work collaboratively to boost pastoralist food security and minimize experiences of the flood.