The invention discloses a medium voltage broadband power line carrier communication circuit. The medium voltage broadband power line carrier communication circuit comprises a broadband carrier chip, a carrier amplifying unit, a carrier receiving unit, a coupling unit, and a power supply unit. The broadband carrier chip is respectively connected with the coupling unit by the carrier amplifying unit and the carrier receiving unit. The power supply unit is respectively connected with the broadband carrier chip, the carrier amplifying unit, and the carrier receiving unit. The carrier amplifying unit comprises a carrier voltage amplifying module and a carrier current amplifying module, which are in serial connection. The carrier current amplifying module comprises a first current amplifying sub-module and a second current amplifying sub-module, which are in a parallel connection. The output end of the first current amplifying sub-module and the output end of the second current amplifying sub-module are respectively connected with the coupling unit. The medium voltage broadband power line carrier communication circuit is advantageous in that a 10kV medium voltage power distribution network is used as high speed data transmission medium for communication, and is used for power amplification of high frequency broadband carrier signals in a range from 0MHz to 20MHz, and has advantages of high communication rate, good communication performance, simple circuit structure, and low implementation costs.