Abstract: Aimed at the design requirements of sonar transmitter for self-contained wave ADCP, a two-channel sonar transmitter is designed and implemented. Starting from the actual demand of the project and combining the theory, working experience and design methods of power circuits, a new design of dual-time sonar transmitter is proposed in this paper, and a prototype is developed. The developed time-sharing dual-channel sonar transmitter is tested in a pool. The experimental results show that the dual-channel sonar transmitter working at time-sharing mode can accurately output the corresponding voltage to meet the requirements of the current and wave measurements by self-contained ADCP.