Abstract: The permeability of coal near shaft wall is low for the reservoir damage, and the space of conventional segmented hydraulic jetting is long. A method of dense segmented radial jet with pre-drilled holes as nozzles was proposed to improve the permeability of coal near shaft wall, and the spring-hydraulic packer and liquid injection nipple were designed and optimized for horizontal well completion with pre-drilled liner. The calculation model of single pre-drilled hole radial jetting and seepage increment ratio of coal breaking cave near shaft wall are established. The number of pre-drilled holes per meter, exit jetting velocity of pre-drilled hole and flow rate were optimized. The influence of permeability ratio K_γ between the solid intrusive zone and the filtrate intrusive zone and the depth of solid intrusion zone H_s on the seepage increment ratio of coal near the shaft wall is analyzed. The results show that the spring-hydraulic packer with a design of non-skeleton rubber cylinders, radial sliders, and strong tensile spring, which improves the stability of high-frequency sealing of the dense segmented radial jetting tools within the pre-drilled liner, achieving completion and reservoir stimulation in one trip for coalbed methane horizontal well. Under the conditions of H_s=3.5 cm and K_γ=0.01, the radial hydraulic jetting space of the pre-drilled liner was reduced to the pre-drilled hole space of 0.05 m, and the seepage increment ratio of coal methane horizontal well increased by 5.5% with dense segmented radial jetting. The research results provide technical guidance for solving the reservoir damage challenge in coalbed methane horizontal wells completed with pre-drilled liner, and theoretical basis for permeability enhancement operations in coal near shaft wall.