Abstract: Based on the data of yields per unit area of millet, wheat and corn from 1949to 2010in Hebei Province and the data of yields per unit area and areas of millet, wheat and corn in 138countries in Hebei Province, the paper compares the difference between the temporal and spatial variation of millet yield per unit area and yields per unit area of wheat and corn. The results show that the millet yield per unit area increases over time, but the rate slows down and compared with that of wheat and corn the difference is becoming larger and larger. From spatial viewpoint, the millet yield per unit area of every country in Hebei has a growth trend from 2000to 2009and the difference is comparatively significant. The countries with higher yield per unit area mainly distribute in piedmount plains and low plains, while the yield per unit area is lower in Yanshan Mountains and Bashang Plateau. The lower yield of millet is mainly due to millet has become secondary food crops from staple food crops over time, the planting areas are being gradually squeezed to arid hills, agricultural infrastructure is weak, the level of scientific and technological progress is low, and harm from diseases, pests, destructive birds and weeds is serious. Therefore, in order to increase the millet yield,the millet production conditions should be improved, the technological and processing level should be enhanced, millet consumption should be guided strongly and products suitable for various consumer groups should be developed.