The invention provides a data mining based automatic research flow well logging evaluation expert system and belongs to the technical field of geophysical well logging. The system comprises a data element model base, a classic knowledge base, an artificial intelligent knowledge base, a user application interface module, a regional research module and a processing and interpretation evaluation module. The data mining technique and the traditional well logging evaluation technique are combined to establish a classic knowledge base model and the artificial intelligent knowledge base in flow automation, real-time comprehensive flow guide and technical support of experts are provided for users to perform rapid well logging evaluation of blocks, and the automatic research flow well logging evaluation expert system is realized.