Automatic blood pressure monitoring method and system based on ultrasonic waves

The invention discloses an automatic blood pressure monitoring method and system based on ultrasonic waves. The automatic blood pressure monitoring method comprises the following steps that ultrasonic waves are emitted based on a flexible ultrasonic transducer array arranged on the body surface of a user, and blood vessel imaging of a target area is received so as to recognize artery blood vessels; determining a working area of the flexible ultrasonic transducer array based on the position of the artery blood vessel; wherein a first ultrasonic transducer used for measuring the diameter of a blood vessel and a second ultrasonic transducer used for measuring the blood flow are arranged in the working area; measuring the blood vessel diameter of the artery blood vessel by using a first ultrasonic transducer in the working area; measuring the blood flow of the artery blood vessel by using a second ultrasonic transducer in the working area; the current blood pressure of the user is calculated through a preset algo