The invention discloses a configuration realization method for transformer protection. A transformer protection device is arranged in situ, and realizes the functions of differential protection, backup overcurrent protection, main transformer automatic switching and the like through a sampled measured value (SMV) network and a generic object oriented substation event (GOOSE) network. The transformer protection device integrating main protection and backup protection comprises differential protection configuration, backup overcurrent protection configuration and main transformer automatic switching configuration, wherein the backup overcurrent protection on each side is independent of the running state of the transformer protection on an opposite side, is realized by performing calculation according to the magnitude of current acquired by the protection on each side through an alternating current plug-in on the local side, and can act and trip to cut off a switch on the local side when the protection device on the opposite side normally runs and the differential protection on the local side is locked; and when the transformer differential or non-electricity protection of a running interval acts and trips, the main transformer automatic switching is started, and an automatic switching closing command is transmitted to the main transformer protection of a standby interval through the GOOSE network to realize the main transformer automatic switching function.