Abstract: The Quaternary and the Neogene alluvial fan developed extensively in Dabei-Keshen gravel zone of Kuqa depression. The surface gravel layer and deep conglomerate layer are distributed at the root of the fan and in the middle of the fan separately. The lithologic characters of the gravel layer are complicated with the thickness and velocity varying significantly, leading to a low signal-noise ratio of seismic data. The methods of ^“wide line and large assemblage^” and ^“static correction and multi-domain filtering^”are used in acquisition and processing to effectively improve the signal-noise ratio of data. However, compactness of the deep conglomerate layer caused the velocity to rise abnormally, seriously affecting identification of structural trap. The surface outcrop and drilling and logging data are used to interpret the seismic facies and sedimentary facies of the alluvial fan, identify the boundary between the conglomerate layer and enclosing rock, clarify the thickness of the conglomerate layer and the law for its velocity variation, and effectively eliminate the impact of the high-velocity conglomerate layer on the underlying structural traps. Based on the efforts for the research on integration of seismic acquisition, processing and interpretation, a large number of high-quality subsalt structural traps of Cretaceous were confirmed and discovered. The high-yield oil and gas flow was found from a number of traps with exploration wells and appraisal wells. The quantity of gas fields is on the rise with important discoveries and breakthroughs made in oil and gas exploration.