Train wheel diameter calibration method, vehicle-mounted controller, train and storage medium

The invention discloses a train wheel diameter calibration method, a vehicle-mounted controller, a train and a storage medium. The method comprises the following steps: acquiring a first actual mileage and a first driving circle number corresponding to a first calibration road section, and acquiring a second actual mileage and a second driving circle number corresponding to a second calibration road section; determining a first wheel speed mileage according to the first driving circle number, and obtaining a target wheel diameter calibration parameter based on the first actual mileage and the first wheel speed mileage; obtaining a calibration actual mileage corresponding to the second calibration road section according to the target wheel diameter calibration parameter and the second driving circle number; performing mileage verification based on the second actual mileage and the calibrated actual mileage to obtain a mileage verification result; and if the mileage verification result is that the verification