The invention relates to an automatic stratum model modeling method based on drilling data with better stratum modeling efficiency and effects. When the method is used, excessive manual intervention is not needed, the professional accomplishment of a user is not highly required, a virtual real geological environment can be presented, the user is helped to intuitively understand the geological environment, experience communication between users of different levels is facilitated, and the user is assisted for scientific decision making and risk aversion. According to the technical scheme of the invention, the automatic modeling method comprises the following steps: S1, complete-layer data and incomplete-layer data are extracted; S2, a complete-layer interface is built; S3, complete-layer entity segmentation is carried out; S4, an incomplete-layer interface is built; and S5, incomplete-layer entity segmentation is carried out. The method of the invention is applicable to geological survey in engineering fields such as industrial and civil engineering, subway and ocean.