Alluvial-proluvial gravel is the main formation of geotechnical investigation in Xinjiang. With description of alluvial-proluvial gravel drilling technology over the past three-decade, the key technical points of various drilling processes are summarized, and the advantages and disadvantages of the drilling process are reviewed. Particularly, analysis and comparison of gravel drilling processes is conducted in the market competition environment with the development direction of drilling technology put forward.