With the advancement of mine construction, 12501 working face, 12503 working face and 12505 working face have been completed in the exploration area of South No. 5 Mining Area of Tunlan Mine. The geological structures interpreted by 3D seismic data were gradually revealed by the underground roadway. From the current exploration and mining comparison, the original 3D seismic exploration geological structures do not match well, and the interpretation results can hardly meet the needs of mine construction. Therefore, the secondary processing and interpretation of 3D seismic data was necessary to improve the interpretation accuracy of geological structures and provide reliable geological guarantee for mine construction and production.