Abstract:Deep karst thermal reserves distribute in Jiyang depression area, convex(latern)area of Linqing depression and Luzhong uplift area, southwestern latern uplift area in Shandong province and Yishu fault belt. Its distribution square is about 44000km2, and the distribution ranges are the same with the strata in CambrianOrdovician period. Deep karst reserves can be divide into deep crackkarst reserve and deep karstcrack reserve with the characters of layer type and strip type. On the basis of previous research results and the ideas of the authors, burying, distribution, water quality, characteristics of geothermosite, developing law of deep karst and the forming condition of geothermal fluid have been analyzed. It will provide help for development and utilization of thermal reserve.