Painted aluminium alloy of gao naihou black positive pole, it comprises two blocks of the same aluminium alloies, the aluminium alloy has left straight flange, goes up topside and right straight flange, on the inner wall of left straight flange from top to bottom in proper order the shaping have the circular slot of left straight flange area open -ended, the first horizontal square insertion slot of left straight flange and the horizontal square insertion slot of left straight flange second, wherein the horizontal plug tenon plug bush of an aluminium alloy is at the horizontal square insertion slot of the second of another aluminium alloy for two blocks of the same aluminium alloies, and it is square whole that two the same aluminium alloy plug bushes constitute an appearance together, and the stand is accommodated in the centre bore that two blocks of the same aluminium alloies formed. It fits together through the aluminium alloy that two block structures are the same, and its middle part energe storage pack square stand, disposes simultaneously and decorates tooth and decorative groove, and its inner wall is provided with multiple slot, makes things convenient for the site operation installation.