The present invention provides a method for calibrating a blood pressure measurement device and a blood pressure measurement device. The method includes: obtaining first blood pressure measurement information of the blood pressure measurement device and a current confidence coefficient corresponding to the first blood pressure measurement information, where the first blood pressure measurement information includes a first systolic blood pressure value and/or a first diastolic blood pressure value； determining whether the blood pressure measurement device includes a historical calibration parameter list, where the historical calibration parameter list includes historical blood pressure calibration information and a historical confidence coefficient corresponding to the historical blood pressure calibration information； and if the blood pressure measurement device includes the historical calibration parameter list, and the current confidence coefficient is greater than or equal to a preset confidence coefficient, or is greater than or equal to the historical confidence coefficient, determining the first blood pressure measurement information as blood pressure calibration information of the blood pressure measurement device, and updating the historical calibration parameter list based on the first blood pressure measurement information and the current confidence coefficient. The method is used to ensure accuracy of blood pressure measurement information and avoid using an extra device to implement calibration of the blood pressure measurement information.
