Adjustable wall-attached support

The utility model relates to the technical field of building equipment, and discloses an adjustable wall-attached support which comprises a support body, two first mounting plates are fixedly connected to the front wall of the support body, second mounting plates are fixedly connected to the sides, away from the support body, of the two first mounting plates, and mounting connecting shells are mounted outside the second mounting plates; a lengthened screw rod is arranged on the installation connecting shell in a threaded and penetrating mode, the lengthened screw rod is in threaded connection with the second installation plate, a limiting block is fixedly connected to the bottom end of the interior of the installation connecting shell, and the limiting block is connected with the second installation plate in a clamped mode. According to the technical scheme, the limiting block is clamped with the bottom end of the second mounting plate, then the second mounting plate and the limiting block are transversely fi