The invention discloses a haulage motor auxiliary current transformation controller and a haulage motor auxiliary current transformer system. The haulage motor auxiliary current transformation controller comprises a collecting plate, an interface board, a control board, a network communication board and a power board, wherein the collecting plate is used for connecting an input contactor, a one-phase four-quadrant rectifier, a three-phase inverter and an output contactor; the interface board is used for connecting the input contactor, the one-phase four-quadrant rectifier, the three-phase inverter, the output contactor, the collecting board and the control board; the control board is connected with the interface board and connected with an upper computer through the network communication board; the network communication board is connected with the upper computer and the control board, used for receiving a haulage motor auxiliary current transformer control command sent by the upper computer and transmitting the haulage motor auxiliary current transformer control command to the control board, and used for transmitting haulage motor auxiliary current transformer state information transmitted by the control board to the upper computer; the power board is used for providing working power for the auxiliary current transformation controller. By means of the haulage motor auxiliary current transformation controller and the haulage motor auxiliary current transformer system, a haulage motor auxiliary current transformer can be monitored, and stability and reliable operation of the haulage motor auxiliary system can be guaranteed.