A barbell support assembly is provided, including: a base; a support arm, including a connection section and a hook section connected with a first end of the connection section, the connection section being rotatably connected to the base and swingable between a first position and a second position, the hook section defining a hooking space; and a restoration unit, connected with a second end of the connection section, biasing the support arm toward the first position; when a rod of a barbell is received within the hooking space, the barbell drives the support arm to move from the first position to the second position, and when the rod of the barbell is removed from the support arm, the restoration unit forces the support arm to return to the first position.