Dimming lamp shade

The invention relates to a dimming lamp shade, which comprises a fixed shade case (1) and an adjustable shade case (2), wherein the fixed shade case (1) is a hemispherical case, two pin holes (3) are respectively arranged in the middles of the two side edges of the fixed shade case (1), the adjustable shade case (2) is a fan-shaped spherical case, the spherical center angle of the fan-shaped spherical case is 45 degrees, two pin holes (4) are respectively arranged at two end parts of the adjustable shade case (2), the corresponding pin hole (3) and the corresponding pin hole (4) are respectively hinged at two sides through a pin shaft (5), the adjustable shade case (2) is placed on the outer periphery of the front end part of the fixed shade case (1), and the distance from the outer case wall of the adjustable shade case (2) to the inner case wall of the fixed shade case (1) is 0.8 to 1.0cm. When the dimming lamp shade is used, the adjustable shade case (2) can be shifted around the pin shaft (5), and when the adjustable shade case (2) is shifted to the lower part of the fixed shade case (1), a part of light rays can be shielded, so the direction and the intensity of the light rays are controlled, and the regulation can be conveniently realized according to work conditions.