The utility model relates to a multi machine ring network communication control topology structure based on high voltage frequency converters. The structure comprises a number of high voltage frequency converters. The high voltage frequency converters are connected end to end to from a ring network through communication optical fibers. Each high voltage frequency converter comprises a control signal data processing CPU board and a control signal transmission PWM board, wherein the CPU board and the PWM board are connected with a data bus through an address bus. The communication optical fibers are connected with optical fiber ports of the PWM board of two adjacent high voltage frequency converters. A control signal generates control data through a CPU. The control data are sent by the PWM board of a high voltage frequency converter, are received by the PWM board of a next connected high voltage frequency converter, and at the same time are read by the CPU of the high voltage frequency converter which receives the data. According to the utility model, the signals received by the high voltage frequency converter are consistent; a number of high voltage frequency converters synchronously operate, which can enlarge load capacity and improve safety redundancy; and the performance of the multi frequency conversion control system is greatly improved.