Underwater wireless sensor networks (UWSN), also called underwater acoustic sensor network (UASN), is an intelligent autonomous network system composed of lots of sensors with communication and calculation capacity, with sound wave as the communication medium. At present, underwater wireless sensor networks will become an essential developing trend of marine monitoring. In recent years, underwater wireless sensor networks technology has achieved rapid development. In this paper, a method to position the underwater wireless sensor networks is designed. According to the underwater wireless sensor networks, the mechanism hierarchical positioning is put forward, and the corresponding compensation algorithm is designed for the underwater dynamic network environment. For intuitively understanding the positioning accuracy of the algorithm, it calculates the error variation of horizontal and vertical error with the positioning times, which verifies the advantages of the positioning method.
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