Electronic sphygmomanometer charging pressure twice is a normal phenomenon, because a charging pressure can not be measured accurately, mainly including human blood pressure is high and a charging pressure is not enough for these two reasons. 1. Human blood pressure is higher than the set value: the first pressurized value of the electronic sphygmomanometer is a set value, when measuring blood pressure, the electronic sphygmomanometer will be automatically pressurized, not exceeding the set value of one pressurization can be measured; if the need to measure the blood pressure is higher than the set value, it will be the second pressurization. 2. Insufficient air pressure at one time: the examinee’s cuff is tied too loosely, the clothes worn by the examinee during measurement are too thick, and the measurement method is not correct, etc., the sphygmomanometer will automatically recognize that the pressure is insufficient to compensate for the measurement again, and only when the pressure reaches the measurement demand. It is recommended to monitor the blood pressure regularly and check and treat under the guidance of physician.