The invention discloses a full-automatic drilling and tapping device. The full-automatic drilling and tapping device is used for machining hardware parts of optical modules and comprises a master control circuit board, a rack, a carrying plate, an automatic loading module, a drilling module and an automatic unloading module, wherein the conveying automatic loading module is arranged at one end ofthe full-automatic drilling and tapping device and comprises a first conveying device and a first position sensor; the drilling module is arranged on the right side of the automatic loading module andcomprises a drilling worktable and a drilling knife module arranged above the drilling worktable; the drilling worktable comprises a second conveying device, a first carrying plate positioning assembly, a first knife returning auxiliary mechanism, a first front-back driving mechanism and a first left-right driving mechanism; and the automatic unloading module is arranged on the right side of thedrilling module and comprises a third conveying device and an automatic unloading device. By the technical scheme, drilling and tapping of the optical modules can be rapidly finished highly automatically, and the machining efficiency is improved.