The existing hydraulic system always have problems of temperature rise,runningstability and anti-interference of the implementation components,reliability of hydrauliccomponents,maintenance difficulties,and other issues.With high efficiency,energysaving,reliability,easy operating,stable running,anti-interference ability,and other advantages,the load-sensitive hydraulic system is more suitable for coal mine all-hydrauliccore rig.Therefore,for the technical development of the coal mine all-hydraulic core rig,the load-sensitive technology employed by the rig should be of great significance. The existing hydraulic system always have problems of temperature rise, runningstability and anti-interference of the implementation components, reliability of hydrauliccomponents, maintenance difficulties, and other issues. W. high efficiency, energysaving, reliability, easy operating, stable running, anti-interference ability , and other advantages, the load-sensitive hydraulic system is more suitable for coal mine all-hydrauliccore rig.Therefore, for the technical development of the coal mine all-hydraulic core rig, the load-sensitive technology employed by the rig should be of great significance.