Disadvantages of ∮60mm wire-line coring drilling rod in medium-deep inclined hole drilling include: low mechanical strength, poor wear-resistance and inconvenient drilling rod disassembling. Quenching and tempering treatment was adopted to wire-line coring drilling rod, the mechanical strength was greatly improved; high-frequency quenching was made to the surface of drilling rod, the hardness and wear-resistance were increased; and the difficulty of disassembling for wire-line coring drilling rod was preliminary solved by heavy wire-line coring joint with mill groove.