Template perpendicularity measuring ruler

The utility model relates to a template perpendicularity measuring ruler, which adopts the following technical scheme: the ruler comprises an upper waling horizontal rod, a lower waling horizontal rod, a connecting rod, a dropper and a plumb bob, wherein one end of the upper waling horizontal rod is provided with an upper datum line, one end of the lower waling horizontal rod is provided with a lower datum line, the two ends of the lower datum line are provided with error bars, the upper waling horizontal rod and the lower waling horizontal rod are connected by the connecting rod, one end of the dropper is connected with the upper waling horizontal rod and is coincident with the upper datum line, and the other end of the dropper is connected with the plumb bob. The distance between the lower datum line and an error bar is 2-5mm. One end of the upper waling horizontal rod and one end of the lower waling horizontal rod are made into a taper. The length of the upper waling horizontal rod and the lower waling horizontal rod is 290-320mm. The ruler disclosed by the utility model is fast in detecting speed, can be used to detect by one person, and is convenient to operate.