The research problem was that the use of water in the production of the most important agricultural crops differs from one region to another within the Arab Republic of Egypt, and therefore it was necessary to measure the efficiency of water use in the production of agricultural crops. And the efficiency of water delivery between different channels. The research relied on (DEA) to measure the efficiency of water use in the regions of the Arab Republic of Egypt in producing the most important agricultural crops. The results indicated that the efficiency of water delivery between Aswan and the mouth of the canals amounted to about 89.4% during the study period, and by studying the general time trend of the development of the efficiency of water delivery between Aswan and the mouth of the canals, it was found that it was increasing at an annual growth rate of about 1.3%. It was also shown that the Wajh region Bahri is the most efficient in using irrigation water for the production of the most important agricultural crops Which was represented by rice, wheat, cotton, beets and maize, which achieved an efficiency factor equal to (1), while the other regions achieved an efficiency factor less than one, which recommends that it is possible to increase the productivity of the acre of the previous crops and the productivity of the unit of water used in their production in the regions where it has been proven that there is a waste of water.