The invention relates to power distribution network state simulation and evaluation technologies, and in particular relates to a power distribution network state simulation and evaluation system based on star topology. The power distribution network state simulation and evaluation system based on the star topology is used for solving the problems of the existing power distribution network state simulation and evaluation networks that the operation is unstable and the reliability is poor. The power distribution network state simulation and evaluation system based on the star topology comprises a PMS server, an SCADA server, a GIS server, a marketing system server, a switch, a database server, a WEB server, a simulation server, an evaluation server, optical fibers and a CAN bus, wherein the PMS server, the SCADA server, the GIS server and the marketing system server are all connected with the switch through the optical fibers; the star topology is jointly formed by the PMS server, the SCADA server, the GIS server, the marketing system server and the switch. The power distribution network state simulation and evaluation system based on the star topology is applicable to the state simulation and evaluation of a power distribution network.