Laser horizon and vertical line combination gauge

The utility model relates to a horizontal and vertical laser line combination ruler, which is composed of a plurality of basic rulers. The basic rulers are characterized in that a ruler body is a square box body which takes off an angle which forms a 45 DEG angle with two crossed sides of a ruler body; a rotatable laser line generator and a power supply for supplying the electricity are arranged in the box body; a symmetry axis of the laser line generator is vertical with the side of the box body; an upper bottom face is provided with two vertical slots; horizontal bead bubbles are arranged in the vertical slots; an intersection of central symmetry axes is provided with a centre hole which penetrates through the upper bottom face and a lower bottom face; a short axis is arranged in the hole and penetrates out of the upper bottom face. The utility model has the advantages that each basic ruler can generate the horizontal laser line or the vertical laser line; the horizontal laser line or the vertical laser line are combined to generate the basic lines combinations which have different angles, such as 0 DEG, 45 DEG, 90 DEG., 180 DEG, 270 DEG, etc. The utility model can be used for the calibration, the position and the calibration of reference lines of the building industry, the household decoration, etc.