Abstract: Aiming at the problems of poor concealment due to the need for satellite collaboration in the current underwater platform timing system and poor timing accuracy dut to the complex underwater acoustic channels, a timing scheme and synchronization commuincation protocol based on network time protocol (NTP) underwater acoustic communication are designed based on the team’s various timing technology accumulation. As well, a hardware platorm is designed and constructed. The timing scheme is verified and evaluated in various underwater environments. By using this scheme and the timing platform to measure the clock difference, the effective measurement values are all within 150 μs.