A retaining wall clamping assembly facilitates bracing of a temporary retaining wall. The assembly includes a bar having a first section coupled to a second section. The first section is selectively extendable and retractable relative to the second section. Each of a pair of jaws extends from an associated one of the first section and the second section. The jaws are aligned defining a clamp for engaging a retaining wall. A bracing aperture extends through the bar for coupling a brace to the bar by a connector inserted through the bracing aperture to support the retaining wall in an upright position.