Gateway detection method based on identification character string and message

The invention provides a gateway detection method based on an identification character string and a message, which comprises a gateway, a gateway physical address, a message sent by the gateway, a gateway data template and a power grid system, and is characterized in that the identification character string is set and stored in the power grid system; then changing more than two bits of codes of the physical address of the authorized gateway into corresponding identification character strings, then scanning the codes of the physical address of the gateway newly accessed to the power grid system, comparing the codes of the physical address of the gateway with the identification character strings, then checking messages sent by the gateways which accord with the corresponding relationship, and sending the messages to the gateway; the method comprises the following steps: receiving a message sent by a gateway, screening out a gateway data template which does not need to be compared, finally comparing the data sim