The adjustable high-power distributed DC power supply controlled by DSP presented in this article is a new type of electronic power supply. Considering the features of modern power system, this article discusses and compares the principles of technical design and application of the adjustable high-power distributed DC power supply controlled by DSP with those of traditional DC power supply. The result suggests that the adjustable high-power distributed DC power supply controlled by DSP is easy to install, energy-saving and environment-friendly. It also has the characteristics of lower cost and higher performance.