Walking heart rate of 120 beats / min is normal, need to consider the following aspects: 1, normal sinus rhythm and not accompanied by other heart disease of normal people, when in the case of strenuous fast walking heart rate reached 120 beats / min, after rest will return to normal, this is a normal physiological response; 2, if only normal slow walking, heart rate reached 120 beats / min, should be considered abnormal. Because the heart rate of a normal person without strenuous exercise is 60-100 beats/min, in this case the heart rate reaches 120 beats/min, the existence of pathological disease should be considered, and corresponding examination is needed, such as monitoring body temperature to consider whether there is infection, testing thyroid function to see whether there is hyperthyroidism, testing BNP to see whether there is heart failure, etc.; 3, the patient itself has heart disease. The presence of ventricular tachycardia, atrial fibrillation or ventricular fibrillation, with a heart rate of 120 beats per minute, its a great risk to life, and must be treated in a timely manner at the hospital.