The utility model relates to the field of the coring of petroleum and natural gas drilling engineering, in particular to an oriented coring position measuring device for medium and long tubes, which consists of an upper dial scale (1) and a lower dial scale (2) which are all semi-circular arcs and have angle indexes on the surfaces, wherein the lower part of the upper dial scale (1) is embedded into the groove of the lower dial scale (2), and the upper and the lower dial scales can bidirectionally and flexibly rotate. The oriented coring position measuring device for the medium and long tubes does not need to measure the arc length between the scale basal lines of the malposed upper and lower inner tubes during the measuring process, the rotation angle can be directly measured, so the defects that the existing measuring mode needs to measure the arc length at first and then calculates the angle is overcome.