A steering device for use in solar tracking equipment includes: a fixed base (10); a rotary base (20) correspondingly connected to the fixed base (10) and provided with a worm gear (22); and a driving module (30) disposed in the fixed base (10) and including a worm unit (33) and an adjustment mechanism (34), the worm unit (33) includes a cylindrical body (331) and a worm (332) supported in the cylindrical body (331), and the cylindrical body (331) is pivoted in the fixed base (10), the adjustment mechanism (34) is disposed corresponding to the cylindrical body (331) for adjusting the swinging motion of the cylindrical body (331), thereby enabling the worm (332) and the worm gear (22) to be mutually engaged. Accordingly, the backlash between the worm and the worm gear is able to be adjusted thereby enhancing the rotation precision.