The utility model discloses a safety protection system between an electric power data communication network and an electric power scheduling network. The electric power data communication network is mainly responsible for services of a production management zone and a management information zone. The electric power scheduling network is mainly responsible for services of a real-time control zone and a non-control production zone. The safety protection system comprises a forward isolation apparatus and a reverse isolation apparatus. The forward isolation apparatus is employed when the electric power scheduling network transmits information to the electric power data communication network unidirectionally, while the reverse isolation apparatus is employed when the electric power data communication network transmits information to the electric power scheduling network unidirectionally. The safety protection system substantially increased the safety of communication between the electric power data communication network and the electric power scheduling network.