The detection of the high-power electromagnetic transmitter, which has a wide frequency range and high accuracy, can be achieved for different depths of the target body. The solution of using DSP FPGA architecture to achieve the accuracy of the transmitter frequency point is proposed in this paper, besides, the topology of the high-power electromagnetic transmitter and the working principle of the H-type inverter are introduced. In addition, how to use DSP to control FPGA to achieve precise control of the PWM waveform frequency, duty cycle and dead time is also be researched. On this basis, an output power of 25kW prototype is developed. The wild experimental results prove that, the high-power electromagnetic transmitter, which is designed in this paper, has a high accuracy and a wide range of RF point, can be used in the actual geological exploration.