Building decorative wallboard with preset floor heating pipe

The invention relates to the technical field of wallboards, and discloses a building decorative wallboard with a preset floor heating pipe. A connecting groove is formed in the upper surface of a decorative board body, the floor heating pipe is fixedly mounted in the decorative board body, and a splicing assembly is fixedly mounted on the rear surface of the decorative board body; and a thermal insulation assembly is fixedly mounted on the lower surface of the decorative board body. According to the building decorative wallboard, a hanging and fixing mechanism is further arranged on the side,provided with a wall face, of the decorative wallboard, the hanging and fixing mechanism can fix the decorative wallboard, and a spacing cavity is formed between the decorative wallboard and the wallface, so that heat losses caused by the fact that heat is transmitted to the wall face is effectively reduced; and in addition, a heat absorption and heat conduction mechanism is further arranged on the side, away from the wal