Abstract: Introduction In order to solve the distribution structure of IDC in special situations, a new design has been proposed. Now the IDC distribution power grid design is already quite mature, which is in the stage of standard design. A variety of typical designs and standard designs have been published, so most of the situation in low voltage distribution design can be satisfied, the traditional design doesn't have too much innovation. However, the standard design does not cover some special scenes, such as the problem of limited power supply caused by the investment problem. Method Based on a specific project, this paper redesigned power grid structure with the concept of resource pool under the background of limited power supply. Result According to the special situation of this paper, we design a new IDC distribution structure and optimize the long-term transformation plan. Conclusion The new structure can satisfy the special situation such as the limited power supply, and which has very high economy and security. The new structure can provide reference for other similar projects.