Camera calibration method and device, object positioning method and device and electronic equipment

The invention provides a camera calibration method and device, an object positioning method and device and electronic equipment, and the camera calibration method comprises the steps: obtaining a calibration image through the shooting of a target camera; the calibration image comprises a calibration tool; the calibration tool is placed on a specified plane in a physical space where the target camera is located, and the calibration tool is rectangular and is divided into a plurality of sub-rectangular areas; identifying a calibration tool in the calibration image, and determining the pixel width of a first specified edge in the sub-rectangular region in the calibration image; determining a focal length parameter corresponding to the sub-rectangular region based on the actual width of the width edge of the calibration tool, the pixel width of a first specified edge in the sub-rectangular region in the calibration image, and the actual distance between the first specified edge and the target camera; and storing