Abstract: "Storing grain on the ground" is an important strategy for grain security in the new era of China. To analyze spatiotemporal variations of grain production in Hubei Province, we used the LMDI approach and decomposed the factors of cultivated land use of grain production. The results showed that Hubei's grain production is in a stable growth period, but its cyclical characteristics hasn't changed and the possibility of harp fluctuations in grain production still exists; the geographical features of grain production in Hubei Province is that the grain production of Central Hubei is high,whereas that in the West and East is low; the increase of yield per hectare and multiple-cropping index is the major factor of the increase of grain production, while the adjustment of planting structure and the reduction of cultivated land resources led to the decrease of grain production. Because of the natural environment and socio-economic development differences, the degree and direction of the adjustment of planting structure and the cultivated land use patterns differs in different regions. Strengthen the protection of cultivated land resource, ensure that the quantity does not reduce and the quality does not decline; adjust cultivated land use patterns, arrange cropping reasonably, optimize planting structure and regional distribution; promote agricultural science and technology innovation, cultivate new occupation farmers, to establish a stable grain production team is an effective way to implement the strategy of "Storing grain on the ground, storing food in technology."

Key words: Grain production, Cultivated land use, Spatial and temporal characteristics, Hubei province