Abstract: Taking the Xialei manganese deposit in Guangxi province as the research object，the large amount of the drilling data is sorted，analyzed and counted so as to obtain the five types of ore-forming parameters such as the number of seam，cumulative seam thickness，cumulative stone thickness，seam roof thickness，and seam floor thickness.The compilation process of lithofacies map is given in detail，and then，the lithofacies map and ore-forming parameters contour map are compiled.Based on the lithofacies map，the relationship between the characteristics of lithofacies distribution and rock association and the ore-forming process of manganese are analyzed.The results show that，the siliceous rock blocks usually owns the maximum number of seam，cumulative seam thickness，cumulative stone thickness，seam roof thickness and seam floor thickness; Manganese ore is mainly controlled by the siliceous rocks，and the sediment background of manganese ore deposit is controlled by the siliceous rock combination features.Manganese ore is mainly deposited in the environment of deepwater and tranquility.

Key words: Quantitative lithofacies map, Ore-forming parameters, Lithofacies distribution, Rock combination features, Siliceous rock