When applied in analyzing inorganic ions in solution, the technology of capillary electrophoresis is high in resolution, fast in separation, low in cost and simple in operation, but low in reproductivity, which, however, can be partly corrected by readjusting composition of the electrolyte solution, rinsing capillaries and some other ways to calibrate the device. The high resolution and rapid separation of capillary electrophoresis makes possible rapid or even real-time analysis of soil nutrition. However, the research on inorganic ion analysis in soil with capillary electrophoresis is still far from enough. The most urgent problems at present are how to speed up pre-treatment of soil samples and improve P extraction capacity. Solution of these problems will raise the efficiency of soil nutrition analysis and help modernize the technology for soil nutrition analysis.