Abstract: A steering lock including a lock body which has a plurality of chambers that hold a horn, a lock cylinder, an alarm control circuit board, and a battery respectively, a locating bar having one end fixedly secured to the lock body at one side and defining a longitudinal plug hole, and an opposite end terminating in a hook adapted for attaching to the steering wheel, a locking bar having one end inserted into the longitudinal plug hole and locked by the lock cylinder, and an opposite end terminating in a forked end adapted for attaching to the steering wheel to secure the steering lock in place, the alarm control circuit board having an inductor adapted for detecting the locking/unlocking position of said locking bar so as to turn on/off the alarm circuit subject based on the position of the inductor.