The invention provides an improved efficient automatic hole drilling system. The system comprises a workpiece machining base which is provided with a plurality of hole drilling devices, a machined workpiece positioning assembly and a machined workpiece transmission assembly. The machining base comprises a tool base frame and a workbench face. The hole drilling devices comprise a fixing support, motors and hole drilling power heads, wherein the motors and the hole drilling power heads are fixed to the fixing support. The fixing support comprises at least one disk-shaped fixing support body which is provided with the motors and the hole drilling power heads. According to the automatic hole drilling system, due to the arrangement of the disk-shaped fixing support bodies for the hole drilling devices, the hole drilling devices at various positions can be quite conveniently arranged, an the hole drilling system can machine holes of more specifications and at more positions at the same time. A sensor control system is used so that the automation degree of workpiece transfer and machining can be higher, continuous and ceaseless operation is achieved, operation efficiency is improved, production cost is reduced, and the great improvement of productivity of an enterprise is promoted.