Combined scribing instrument

The invention discloses a combined scribing instrument consisting of a base, an upright post, a rocker arm shaft, a vertical shaft, a horizontal shaft, a positioning sleeve, a sliding sleeve and scratch awls, wherein the rocker arm shaft is parallel to the horizontal shaft; the scratch awls are respectively arranged at one end of the rocker arm shaft and one end of the horizontal shaft; and a short shaft is parallel to the vertical shaft; the scratch awls are respectively arranged at one end of the short shaft and one end of the vertical shaft and are respectively mutually connected and positioned through the sliding sleeve and the positioning sleeve so as to form a basic structure with two horizontal devices and two vertical devices. With the structures of the rocker arm shaft, the vertical shaft, the horizontal shaft and the short shaft and by up-down and left-right movement or rotation of the sliding sleeve, the invention not only can align, scribe and singly scribe on the plane, but also can scribe three-dimensional parallel lines, three-dimensional vertical lines, circles, side circles, tip circles and the like, thereby realizing multifunction by one machine and improving the efficiency and the precision for scribing.