The invention discloses a multifunctional measuring and line drawing ruler which comprises a ruler main body, a movable ruler, an installation structure, an angle scale, a first datum line and a second datum line. The movable ruler is rotationally arranged on the ruler body, the installation structure is arranged on the movable ruler and used for installing a line drawing pen, the angle scale is arranged on the ruler main body, the circle center of the angle scale coincides with the rotation center of the movable ruler, the first datum line is arranged on the ruler main body, a drawing radiusline is formed between the rotation center of the movable ruler and the center of the line drawing pen, the drawing radius line can coincide with the first datum line, the second datum line is arranged on the ruler main body, the movable ruler is provided with an angle measuring line which can coincide with the second datum line, and the angle measuring line rotates along with the movable ruler toform an angle measuring mechanism with the second reference line. According to the measuring and line drawing ruler, the movable ruler which is rotatably arranged on the ruler main body is matched with the angle scale to carry out angle measurement, the line drawing pen is arranged on the movable ruler, a circular arc line can be drawn by rotating the movable ruler, and therefore the functions ofangle measurement and circular arc line drawing can be added through a simple structure.