Abstract: Pointing Polaris error directly affects measure accuracy for equatorial telescope, and searching for an effective method of finding true north is very important. The equatorial telescope was fixed to point to the south equator, if the trace of star which traversed in the field of view was not a horizontal line, and then the polar axis of telescope was rotated about vertical axis until the trace of star being a horizontal line. The equatorial telescope was fixed to point to the east or west equator, if the trace of star which traversed in the field of view was not a horizontal line, and then the polar axis of telescope was rotated about horizontal axis until the trace of star was a horizontal line. The principle for the method of finding true north was deduced and analyzed on the base of spherical triangle. Horizontal pointing error of polar axis was adjusted when telescope pointed to the south equator, and vertical pointing error of polar axis was adjusted when telescope pointed to the east or west equator. The equatorial telescope which is adjusted by using the method rotated about polar axis with constant speed in 50 minutes, and target error projected to Y axis of star which was measured transfered 4. Observation result confirms that the method was simple and effective, and pointing error of polar axis of equatorial telescope adjusted by using the method is limited.