Abstract: According to experimental data on the water consumption of crop measured by lysimeter at Yucheng Experimental Station, Chinese Academy of Sciences, the water consumptions and the waterconsumpting processes of winter wheat and summer maize were respectively analyzed.The water consumption of crop was 482.2 mm for winter wheat and 398.9 mm for summer maize. The water use efficiency was 11.01 kg·（hm^２·mm）^-1 for winter wheat and 19.79 kg·（hm^２·mm）^-1 for summer maize in Yucheng City. The schedules and managements of irrigation in the highyielding cultivation of winter wheat and summer maize　were studied． The yield is 6000 kg／hm^２ for winter wheat, and 9000 kg／hm^２ for summer maize respectively．The highyielding irrigating quota is 360 mm for winter wheat and 150　mm for summer maize. The irrigation periods are overwintering， greenturning, jointing, heading and milking for winter wheat and emergence, flowering and milking for summer maize. 