The invention provides a computer automatic splicing method of a power station model, which relates to the technical field of power system dispatching control and power network topology structure. Themethod firstly digitally names the transformer, bus bar, disconnector, circuit breaker and substation in the plant and station, including the basic information and topology information of each electrical component; The named electrical components and the graphical element model of each electrical component are established into a mathematical model library of electrical components. Then the mapping relationship between the naming of each electrical component and its graph metamodel is established. The basic information bits and topological relation bits of each electrical component are automatically searched and spliced by computer, and then the digital naming and graphic meta-model are established one-to-one correspondence, and finally the model splicing in the same plant and station is realized. The invention provides a computer automatic splicing method of a plant-station model, which adopts a brand-new naming mode to name electrical components in the plant-station, thereby realizing fully automatic power network model splicing.