The invention discloses a cam shaft phase sensor performance test method. A rotation shaft connected with a motor is equipped with a first signal target wheel and a second signal target wheel; a fixation shaft is equipped with a standard sample member fixation cantilever and a test sample member fixation cantilever; the standard sample member fixation cantilever is equipped with a sensor standard member for testing the rotation phase of the first signal target wheel; the test sample member fixation cantilever is equipped with a sensor detection member for testing the rotation phase of the second signal target wheel; the sensor standard member and the sensor detection member are connected with an oscilloscope; the motor drives the rotation shaft to rotate, and the first signal target wheel and the second signal target wheel are in synchronous rotation; the rotation phase of the first signal target wheel and the waveform of the standard sample member are displayed through the oscilloscope; the rotation phase of the second signal target wheel and the waveform of the test member are displayed through the oscilloscope; and by comparing the waveform of the standard sample member and the waveform of the test member, the performance of the cam shaft phase sensor test member is judged. The method is visual in judgment, high in test efficiency and good in test precision.