During drilling of shale gas parameter wells in the block of Quanzijie area, there were some problems such as poor formation drillability, strong abrasiveness, slow drilling rate, less footage per drill bit (cone, PDC) and high abandonment rate. Through the analysis and evaluation of the rock drillability of the Quanzijie block, this paper provides the basis for shale gas exploration drilling bit selection and the optimization of the drilling design in this area so as to achieve the purpose of improving drilling efficiency, reducing drilling cost and shortening the construction duration.