Abstract: An extendable backdrop erecting device, comprising: a fixed wall disposed at one end of a space and having a fixed backdrop surface that faces away from the one end of the space, two lateral ends of the fixed wall being each provided with a first pivot; a movable wall disposed beside the fixed wall and having a first movable backdrop surface corresponding to the fixed backdrop surface, two lateral ends of the movable wall being each provided with a second pivot; and two extendable and foldable walls pivoted between the first pivots and the second pivots respectively and each having a respective foldable backdrop surface, wherein the movable wall can move to the other end of the space as the foldable walls extend so that the fixed backdrop surface, the first movable backdrop surface and the foldable backdrop surfaces are located around the space to increase the convenience in use.

Abstract: An extendable backdrop erecting device, comprising: a fixed wall disposed at one end of a space and having a fixed backdrop surface that faces away from the one end of the space, two lateral ends of the fixed wall being each provided with a first pivot; a movable wall disposed beside the fixed wall and having a first movable backdrop surface corresponding to the fixed backdrop surface, two lateral ends of the movable wall being each provided with a second pivot; and two extendable and foldable walls pivoted between the first pivots and the second pivots respectively and each having a respective foldable backdrop surface, wherein the movable wall can move to the other end of the space as the foldable walls extend so that the fixed backdrop surface, the first movable backdrop surface and the foldable backdrop surfaces are located around the space to increase the convenience in use.