Focusing method, device, equipment and medium

The invention discloses a focusing method and device, equipment and a medium, which are used for realizing rapid focusing of a tracking target, and determining a first area of the tracking target when the tracking target exists in a monitoring scene of a camera; determining a first focusing motor step number corresponding to the object distance between the first area of the tracking target and the camera; a second focusing motor step number corresponding to the distance between a first position and a second position is determined, the first position is the position of a first area of the tracking target, and the distance between the first position and the second position is equal to the distance between the position of the first area of the tracking target and the position of a second area of the tracking target in the first direction; the connecting line of the first position and the second position is parallel to the second direction; determining a third focusing motor step number corresponding to the objec