The utility model discloses a highway base drilling
machine, including the mounting bracket, is equipped with the adjusting device on the mounting bracket, and the mounting bracket one side is equipped with the
drill rod, is connected with the connecting device on the
drill rod, and the connecting device includes the spigot, the limiting ball, the splicing mechanism, the rotary stand, the cooperation cover, the cooperation pole, the spiral groove and the connecting sleeve, and the spigot is installed in the connecting sleeve, and the limiting ball is installed in the spiral groove, and the rotary stand sets up in the cooperation cover outside, and the cooperation pole is installed in the cooperation cover outside, and the spiral groove is set up in the connecting sleeve outside, and the anti overload mechanism is connected with below spigot, and the anti overload mechanism includes the connecting rod, the installation slot, the spring, the clamping block and the clamping groove, and the connecting rod is installed below spigot, and the clamping groove is set up in the connecting rod side wall, and the installation slot is set up in the connecting sleeve inboard, and the spring is installed in the installation slot, and the clamping block one side is connected with the spring, and the clamping block other side is engaged in the clamping groove, the utility model improves the operation flexibility of highway base drilling
machine, has reduced the construction risk, has improved the construction efficiency.