all agricultural policies in Egypt are concerned with increasing the production of food crops, especially with cereals, broad beans and sugar crops. This research tries to show how better allocation of resources will help to increase production of these crops in case of climate change in old land in Egypt. The research used the linear programming technique to determining the optimal cropping pattern to test the efficiency of agricultural resources in the production of crops in Egypt governorates. The results show that the use of agricultural resources has deviated from the optimum utilization of resources in south and north Egypt, which maintains the economic efficiency after land effective by impacts of climate change. Increasing yield per fed considered an important means because the area under cultivation is limited, to meet the increasing demand. The results show that for the entire Egypt governorates yield per fed of main crops decreased after affected. Now it is obviously the impacts of climate change on production crops in Egypt governorates. Using thefor determining the optimal cropping pattern, represents the net profit per cropping pattern at farm gate prices increased by LE 149715.491 million or 106.397%. Water using decreased by 8306.168 million cubic meters or 18.675 %. CO2 emission decreased by 2965.619 million kilogram or 19.555 %. Energy consumption decreased by 21147.970 million liter or 10.450 %. The research recommends expanding export field crops such as cotton, potatoes, onion and garlic in addition to wheat, sesame and sugar beet at the same time decreasing the area of clover (berseem) and rice. linear programming technique to treat impacts of climate change in Egypt