Blood pressure data correction method, blood pressure data correction device and electronic sphygmomanometer

The invention discloses a blood pressure data correction method, a blood pressure data correction device and an electronic sphygmomanometer. The blood pressure data correction method includes: determining size of a part, of a user, wearing an air bag according to a feature of a driving signal of an air pump of the electronic sphygmomanometer, wherein the part of the user refers to the part, of a body of the user, wearing the air bag of the electronic sphygmomanometer when the user measures the blood pressure; correcting the blood pressure data measured by the electronic sphygmomanometer according to a proportional relation between pre-stored width of an air bag sleeve and the size of the part, of the user, wearing the air bag. The blood pressure data correction method, the blood pressure data correction device and the electronic sphygmomanometer have the advantages that blood pressure data can be corrected according to features of different wearing parts of the user, and the blood pressure data measured by the electronic sphygmomanometer can be more accurate.