Non-invasive arterial blood pressure waveform calculation method

The invention provides a non-invasive arterial blood pressure waveform calculation method which comprises the following steps: S100: placing two ultrasonic transducers, wherein one ultrasonic transducer is perpendicular to an arterial blood vessel, and the other ultrasonic transducer and the arterial blood vessel are arranged at an included angle; S101: transmitting and receiving ultrasonic signals by two ultrasonic transducers, and carrying out high-frequency sampling on the received ultrasonic signals; S102: carrying out band-pass filtering on the ultrasonic signals acquired by the two ultrasonic transducers, carrying out Hilbert transformation on the filtered signals, and converting the signals into complex signals; S103: calculating a cross sectional area of the artery by using the ultrasonic signal received by the ultrasonic transducer perpendicular to the artery blood vessel; S104: calculating flow of the arterial blood by using the ultrasonic signal received by the ultrasonic transducer which forms the