Abstract: As an important component part of a regional geological map, the cutting section can reflect the characteristics of subsurface strata and structure. but previously the cutting section of a geological map was produced by hand, so the production efficiency was low and the secfion not easy to kecp and update. The main steps of the production are as follows: (1) preparation of a vectorized geological map, (2) automatic production of a cutting section by the computer, and (3) interactive modifying and output of the cutting section. Take for example the geological map of the Yujiashan area, Wuhan City, this paper proves that this system has high efficiency and good quality and so can meet the requirements for producing the cutting sections of geological maps of various scales.