The invention, which belongs to the technical field of distribution, provides a common-information-model(CIM)-based simplifying and mapping method for a distribution network station room and station equipment. The method comprises: station equipment containers, station room containers and station room spacing containers are built respectively; the station equipment is simplified, CIM model traversing is carried out, attributes of the station room, the simplified station equipment, and all equipment ports are analyzed and the station room, the simplified station equipment, and all equipment ports are stored into the station room and station equipment containers; all station equipment containers are traversed and station equipment of all station rooms are determined; according to the station equipment of all station rooms, the layout of all station rooms is realized, and spaces of all station rooms are determined; and the sizes of all station rooms in the distribution network are determined, all station rooms in the distribution network are drawn, station room spacing containers are transverse, and spaces of all station rooms are drawn. Therefore, mapping of station equipment is realized and the practical structures of station rooms are restored basically, so that the reliability and accuracy of the planning calculation and analysis results of grid equipment after mapping are improved.