Many factors should be considered in the design of photovoltaic power station. Of course, the layout and size of cement pier should be given in detail. The following figure 2-7 is the construction layout of cement pier. The distance between the cement pier in the square array is 2200mm from north to south, 2000mm from east to west, 3730mm from south to North and 3000mm from east to west. Figure 2-8 is the cement-based column diagram, and the size of concrete foundation is 400 * 400 * 400mm.