Beamlet transform has obvious effect in extraction of linear and curvilinear features.The seismic coherence slice can be regarded as an image in three-dimensional seismic interpretation.Beamlet transform can identify and extract linear and curvilinear features in the slice.This paper describes the basic principles of the beamlet transform as well as its advantage in linear feature extraction of the noise-containing image.The authors used the beamlet transform to guide the fault interpretation of seismic slice data obtained in Yuanba area of Sichuan.The results show that the method has obvious advantages in interpretation of small faults and fissures.