The invention discloses a method for obtaining aorta pulse wave velocity (aoPWV) based on a peripheral artery pulse wave signal, relating to the field of cardiovascular medicine in biomedicine. The method is characterized in that the reflected wave can be obtained through shift subtraction based on upper and lower artery pulse waves; the transmission time deltat of the pulse waves along the aorta can be simply obtained; the aoPWV can be further calculated; and the calculation formula is aoPWV=L/deltat, wherein L is double of the body surface measurement length of the aorta. The method has the following beneficial effects: the upper and lower artery pulse waves are utilized for the first time to obtain the transmission time of the pulse waves along the aorta; the method is simple and convenient to operate; the aoPWV can be rapidly obtained by the method; and the pulse wave acquiring positions are transferred from the carotid-femoral arteries to the upper and lower arteries, thus reducing the signal acquisition difficulty and the potential safety hazard.