The invention discloses a drilling machine and particularly discloses a numerical control cross-slot spring-hole drilling machine. The numerical control cross-slot spring-hole drilling machine comprises a machine frame part, a main base, a drill bit, a vertical base, a worktable, a workpiece holder, a control switch and an operation keyboard, and is characterized in that: the workpiece holder which adopts pneumatic clamping is arranged on the worktable, and the drill bit is installed on a high-speed electric main shaft. The numerical control cross-slot spring-hole drilling machine has the beneficial effects that: by adopting the a linear optical axis matched with a linear bearing, the worktable moves forwards and backwards as well as left and right by a step motor which combines zero-clearance transmission ball screw, the feeding precision during motion is ensured, the automation degree and the production efficiency are greatly improved, and the processing precision is high. The rotation of the workpiece holder is realized through the step motor which can freely adjust the rotation angle and speed by computer control.