Abstract: Based on the theory of the time reversal mirror(TRM) technology, the basic principle of passive positioning with pressure time reversal mirror(PTRM) is studied.On the basis, a PTRM positioning simulation analysis of PTRM is made, and the data from lake trial are analyzed.It has been seen that the testing results are basically in agreement with theoretical results and showed that PTRM can effectively carry out passive positioning of underwater moving target.