Abstract: Division and comparison of basement carbonate rock formations of Damintun depression in Liaohe Basin has been remained controversial. One of the controversies is about whether Paleozoic exists in this set of formations. Another is the issue of partition attribution– whether this set of formations belongs to Liaoxi area or Liaodong area. Based on a comprehensive study of the data concerning lithological characters of drilling section, paleontology, seismic survey, logging and geochemistry, this set of formations can be divided into Dapashan formation and Kangzhuangzi formation of the Proterozoic Changcheng system, the Lower Paleozoic Cambrian – Ordovician system, the Upper Paleozoic Carboniferous – Permian system and a number of lithologic sections. The basement carbonate rock strata are located on the northeastern periphery of the table land in North China. The stratigraphic sequence and lithologic characters of the strata can be compared to those of Panhe formation, but there are some differences. Proterozoic bedrock, mainly Changcheng system, can be compared to Changcheng system in Panhe formation. The main difference is that the Paleozoic missing in the near surface can be found in the northern basement of Damintun depression. The Middle Cenozoic is located at the intersection of Tanlu fault in Bohai zone, belonging to Lower Liaohe formation zone.