Vortex street throttling moisture flow meter and moisture flow measuring method

The invention discloses a vortex street throttling moisture flow meter which comprises a measuring tube, a vortex generating body and a frequency and temperature composite sensor are sequentially arranged in the measuring tube in the flowing direction of fluid, a differential pressure tapping hole is formed in the wall of the measuring tube, and the frequency and temperature composite sensor is fixedly connected with a frequency and temperature composite transmitter. The intelligent differential pressure flow transmitter is arranged above the frequency and temperature composite transmitter, the frequency and temperature composite transmitter is connected with the intelligent differential pressure flow transmitter through a signal line, the differential pressure tapping hole is connected with the intelligent differential pressure flow transmitter through a pressure tapping pipe, and the inner diameter of the measuring pipe is reasonably designed, so that gas-liquid layering when moisture flows through the meas