Basic features of geo-materials generally show spatial variability to some extent due to their natural cause of formation. It's difficult to give a full description of the field basic features of geo-materials by use of limited testing data. The values of parameters which represent the basic features of geo-materials have great influence on the geotechnical engineering design. In this paper, a concept of genetic features for geo-materials is firstly proposed and definition as well as some attributes with regards to this concept are also given. Based on big data analysis and a large amount of data collected from practical projects in Chongqing, method for searching the genetic features of geo-materials is proposed. A software about the genetic feature analysis is developed and it can be used for collection, analysis and management of geo-materials data obtained from engineering practice. Based on it, more than 70 000 data about genetic features of typical geo-materials in Chongqing are collected and analyzed, some typical genetic maps of geo-materials in Chongqing are obtained.