Abstract: Based on the systematic description of high density 3D seismic exploration technology researches and application status at home and abroad, three key parameters and concepts of high density 3D seismic exploration technology are discussed, the high density 3D seismic exploration technique is a integration of advanced seismic exploration technology, with combination and relativity, should be applied flexibly and carried out according to local conditions. Based on the analysis of the seismic geological conditions and technical characteristics of Shanxi coal mining areas, it is proposed that the "3+X" technical route should be followed, that is "small surface element, high coverage, wide azimuth (3 necessary conditions), corresponding key acquisition and processing technology(X, necessary option)" in the high density 3D seismic exploration in Shanxi coal mining area; improving signal-to-noise ratio is the kernel in the process of data acquisition and processing, high precision static correction and pre-stack noise should be the core in data processing. The validity of this technique is proved by the practical application examples. This idea can be used as a reference for colleagues who are engaged in high density 3D seismic exploration, and it has certain significance for improving the resolution and accuracy of seismic interpretation results.