Based on the planting area and yield of corn of 184 counties in Beijing-Tianjin-Hebei region, the comprehensive advantages and time-space distribution characteristics of maize planting were measured and analyzed by using the comprehensive comparative advantage index method and spatial clustering analysis method. The conclusions were as follows:Large-scale area of corn planting in Beijing-Tianjin-Hebei region(>1×10~4 hm~2), medium scale(0.1-1×10~4 hm~2) and small scale(<1×10~3 hm~2) accounted for about 70%, ...