A calibration method for a blood pressure measuring device, and a blood pressure measuring device. The method comprises: acquiring first blood pressure measurement information from the blood pressure measuring device (S401) and a current level of confidence corresponding to the first blood pressure measurement information (S402), the first blood pressure measurement information comprising a first systolic pressure value and/or a first diastolic pressure value; determining whether the blood pressure measuring device comprises a historical calibration parameter list (S403), the historical calibration parameter list comprising historical blood pressure calibration information and a historical level of confidence corresponding to the historical blood pressure calibration information; if the blood pressure measuring device comprises the historical calibration parameter list, and the current level of confidence is greater than or equal to a preset level of confidence, or is greater than or equal to the historical level of confidence, then confirming the first blood pressure measurement information to be the blood pressure calibration information of the blood pressure measuring device, and updating, on the basis of the first blood pressure measurement information and the current level of confidence, the historical calibration parameter list (S405). The calibration method for the blood pressure measuring device and the blood pressure measuring device are used to ensure the accuracy of blood pressure measurement information and to avoid the use of an additional device for achieving calibration of the blood pressure measurement information.L'invention concerne un procédé d'étalonnage pour un dispositif de mesure de pression artérielle, et un dispositif de mesure de pression artérielle. Le procédé consiste : à acquérir des premières informations de mesure de pression artérielle à partir du dispositif de mesure de pression artérielle (S401) et un niveau de confiance actuel corr