The invention provides a PIV measurement-based water jet propulsion ship model inlet current obtaining test method and relates to the field of hydrodynamic performance tests for special propulsion ship models. The method can be used for accurately measuring speed distribution of a flow obtaining zone of a water jet propulsion ship model, quantitative research on mutual influence between a ship body and a propeller system can be conducted, and particle image velocity measurement technologies are widely applied to ship circumferential flow field measurement. According to the PIV measurement-based water jet propulsion ship model inlet current obtaining test method, a surface of a shop model is subjected to preprocessing operation, a problem of ship body reflection is overcome in PIV measuringprocesses, a model fixing test run instrument is adopted for controlling ship attitude change in ship model self-propulsion tests, a problem of vector distortion near the ship body caused by ship model movement can be solved, and measurement result precision can be improved via collection of multiple groups of double frame images through repeated tests. The PIV measurement-based water jet propulsion ship model inlet current obtaining test method disclosed in the invention is high in maneuverability and applicability, and good in perspectiveness and popularization value in the fields of scientific research.