Abstract: In this paper,we use the rule to unify the semantic representation of 3D entities to provide a unified approach of modeling.Using the framework of 3D vector data model,respectively,according to rules to develop a data format,such as straight hole,oblique hole,profile,contour,fault,fold and other data sources,standardization and information fusion of multi-source geological data,through the rapid construction of geological surface and geological body,a 3D vector data model based on rule base is established.And the automatic construction method of three-dimensional model suitable for all kinds of geological features is studied,including multi-source data coupling automatic modeling technique for layered. Automatic modeling of partitioning-splicing based on section cell partitioning,rapid modeling technology of complex geological structures under multi-constraints and 3D geo-attribute modeling technology with spatial constraints and so on.In ensuring the accuracy of the model under the premise,minimize the amount of human interaction modeling effort for improving modeling efficiency.

Key words: rule base, three-dimensional geology, modeling technology