High-speed wireless data secure transmission system and method suitable for distribution network system

The invention discloses a high-speed wireless data secure transmission system and method suitable for a distribution network system. The secure transmission system comprises a distribution network automation system, a data transceiving and forwarding module, a composite security bridging module, a 3G wireless communication module, an individual line APN and a plurality of FTUs. According to the security protection level of a power system network, the end-to-end data encryption technology and the individual line APN technology are selected to guarantee the security of the network environment and data. An SIM card used for a private network only uses the dedicated APN, and usage of other APNs is limited; in other words, the SIM card will not be connected with the Internet in the data transmission process; in addition, the individual line APN and the Internet are two network structures completely stripped, and the end-to-end data encryption technology is adopted between the FTUs and a server platform; in this way, possible leakage of information in the whole transmission process is avoided, the security of the network environment is guaranteed, and meanwhile the security of data transmission is guaranteed.