The invention discloses an automatic locating method and device for a tire pressure sensor. The method includes the steps that a vehicle steering angle is obtained; motion parameters, detected by the tire pressure sensor, of a tire where the tire pressure sensor is located are obtained; when the vehicle steering angle is larger than a preset value, the rotation angular speeds of the tire where the tire pressure sensor is located are solved according to the motion parameters; and the corresponding relationship between the tire pressure sensor and the tire is determined according to the vehicle steering angle and all the angular speeds. By the adoption of the technical scheme, a user does not need to manually input a tire pressure sensor ID number or detach and install the tire pressure sensor again, and the corresponding relationship between the tire pressure sensor and the tire where the tire pressure sensor is located can be automatically identified.