An adjustable embedded display unit backframe includes a backframe base and a plurality of engaging assemblies. The backframe base has a front for holding a display screen and a back opposing the front. The back has a plurality of slide rails. The engaging assemblies are disposed in the slide rails, respectively, and slidable relative to the backframe base. The engaging assemblies each have an engaging component for engaging with a wall. With the engaging assemblies being slidable relative to the backframe base, the adjustable embedded display unit backframe is suitable for different sizes of the opening bored in the wall, not only sparing the hassle of boring an opening in the wall anew, but also ensuring that the use of the adjustable embedded display unit backframe is easy and flexible.