Wallboard inner layer thermal insulation structure

The utility model relates to the technical field of thermal insulation materials, and discloses a wallboard inner layer thermal insulation structure which comprises a wallboard, a thermal insulation board is fixedly connected to the interior of the wallboard, a protection board is arranged on the outer side of the thermal insulation board, the outer wall of the protection board is flush with the outer wall of the wallboard, and a connecting assembly is arranged between the protection board and the thermal insulation board; and the connecting assembly comprises a first pre-embedded sleeve fixed into the heat preservation plate and a second pre-embedded sleeve fixed into the protection plate, two limiting springs are fixedly connected into the first pre-embedded sleeve, connecting plates are fixedly connected to the opposite sides of the two limiting springs, and wedge blocks are fixedly connected to the opposite sides of the two connecting plates. According to the wallboard inner layer heat preservation struct