The embodiment of the invention discloses a tracking focusing method which comprises the steps of tracking a target to sequentially acquire image frames, wherein the image frames comprise target tracking regions; calculating change values of size parameters of the target tracking regions and a change value of a focusing evaluation value; according to the change values of the size parameters and the focusing evaluation value, calculating a rotating step length of a motor; and according to the rotating step length of the motor, generating a motor control instruction to carry out focusing. The embodiment of the invention also discloses a focusing tracking apparatus. By adopting the tracking focusing method and apparatus, an automatic focusing speed can be improved, and picture fluttering is reduced.