The invention provides a PWTT-based dynamic continuous blood pressure measurement method, and belongs to the technical field of non-invasive continuous blood pressure measurement. The PWTT data are flexibly screened, the PWV is obtained through the PWTT, the arm length and the average distance from the shoulder to the heart of the normal person, the precision of the finally calculated PWV is higher, meanwhile, when the blood pressure is calculated based on the PWTT, the direct correlation of the two is considered, the relation between high pressure, pulse pressure, the heart rate and the blood pressure is also considered, By calculating the autocorrelation coefficient, the regression coefficient and the regression constant among each group of data and finally calculating the blood pressure value according to the calculated parameter regression equation, the result is more accurate, in addition, in the process, data collected in real time and calibration data participate in data screening and subsequent calculation of the regression coefficient and the like together, and the real-time acquired data is added into a calibration area for new measurement, and the calibration area is continuously optimized, so that the blood pressure measurement result is more accurate.