The controlled switching is a significant method to restrain shock to the mechanism itself and power system when operating high-voltage circuit breakers. By the change of substation digital sampling and higher requirement of controlled switching on accuracy and reliability on high voltage level, this paper improves the independent controlled switching solution. It studies the technologies of independent operation and composite output of IGBT contact and relay contact based on microcontroller and FPGA coordination, and on this basis, designs new circuit and hardware. It proposes a frequency and phase calculation algorithm based on complex vector extraction for target point calculation. This solution can improve precision of controlled switching and prevent from electromagnetic interference. After simulation and system testing verification, the studied controlled switching device in the paper is able to accurately operate circuit breakers in target points, which proves the effectiveness of the solution. This work is supported by Scientific and Technological Achievements Transformation Fund Project of Jiangsu Province (No. BA2016057).