Provided is a control device of an energy-storing current transformer. The control device comprises a central processing module, a power supply module, a voltage converting module, a current converting module, and a pulse amplifying module. The central processing module including a main processor unit, a switching value unit, an analog quantity sampling unit, a pulse triggering unit, and a communication unit is disposed on a master control board and comprises double DSP (28335) chips and a FPGA chip which are connected by data bus and an address bus. The master control circuit is also equipped with RS485 serial ports, a CAN communication interfaces, an Ethernet interface, a random access memory RAM, a double-port RAM, an AD sampling module, and a buffer. The RS485 serial ports, the CAN communication interfaces, the Ethernet interface, the random access memory RAM, and the double-port RAM are connected with the DSP chips. The AD sampling module and the buffer are connected with the FPGA chip. The analog signal input end of the AD sampling module is connected with the analog quantity output ends of the voltage converting module and the current converting module via shielding wires. The buffer is connected with the switching value unit, the analog quantity sampling unit, the communication unit, and the pulse triggering unit via data lines. The pulse triggering unit is connected with the pulse amplifying module via a shielding wire. The control device is convenient for installation, maintenance, and fault investigation.