The traditional physiology textbooks hold the opinion that arterial blood pressure gradually decreases as it moves away from heart, which we think is not precise saying. A large number of studies have shown that the arterial systolic pressure and pulse pressure will gradually increase during the pressure wave transmitting from aorta to the peripheral large arteries. This phenomenon can be explained by pulse wave reflection theory. This paper suggests that the relevant expressions in traditional textbooks should be corrected to make them more accurate, so as to avoid misleading medical students or clinicians. Pulse wave reflection has potential physiological and clinical significance, which should be paid more attention to.