Abstract: The study area is located in the Sino Korean paraplatform (Ⅰ),Yanshan fold belt (Ⅰ4),West Liaoning depression(Ⅰ14),chaoyang dome fold break beam (Ⅰ1-24) within the basin of siguanyingzi～goumenzi.It is found that cement limestone deposits occur in the strata of the first and seventh member of the middle Cambrian zhangxia formation of the Paleozoic.And some layers meet the requirements of fluxing limestone.In order to find out the geological features and genetic types of the cement limestone mine of maotouba,through geological exploration and comprehensive study of previous regional data,the regional strata presents inverted anticline structure,and the ore layer is strictly controled by the stratum.The ore is gray dark gray,the natural type is gray medium thick~ thicker layer oolitic limestone ore and gray medium thick layer micritic limestone ore.Identify areas of industrial significance of fiveⅠ grade seams,threeⅡ grade seams.The genetic type of ore deposit is Marine sedimentary deposit.The oolitic limestone in the first and seventh member strata of the middle Cambrian zhangxia formation is a prospecting indicator.This is the first time for cement limestone explorationin western area of Liaoning province,It fills up the blank of looking for cement limestone in the middie Cambrian zhangxia formation in western area of Liaoning province.

Key words: Limestone for cement, Zhangxia formation, Reversed anticline, Horizon control, Marine sedimentary deposits, Prospecting signs