The invention relates to a projection screen regulator. The projection screen regulator includes a frame, a screen bolt is fixed on the frame, and the upper end of the screen bolt is clamped by a first hand-shaped clamping jaw and a second hand-shaped clamping jaw; the first hand-shaped clamping jaw is connected with a first steering engine through a single universal coupling, and the second hand-shaped clamping jaw is connected with a second steering engine; both the first steering engine and the second steering engine are connected with a signal generator, and the first steering engine enables the first hand-shaped clamping jaw to drive the screen bolt to perform regulation through the single universal coupling in a front-back direction under the control of the signal generator; and the second steering engine enables the second hand-shaped clamping jaw to drive the screen bolt to perform regulation in a left-right direction under the control of the signal generator. The projection screen regulator provided by the invention can achieve a relatively high reflection condition, and generates high-quality pictures.