The invention relates to a fully-automatic tapping machine which comprises a machine frame, wherein the machine frame is provided with an operating platform, and the operating platform is provided with an automatic feeding mechanism, an automatic clamping mechanism and an automatic tapping mechanism. According to the fully-automatic tapping machine, the operating platform, the automatic feeding mechanism, the automatic clamping mechanism, the automatic tapping mechanism, a material receiving plate and the like are reasonably arranged on the machine frame, so that the whole machine integrates the functions of automatic feeding, feed-linkage clamping, automatic tapping, automatic cutter retracting, automatic blanking, automatic material and residue separation, automatic cycle and the like, many problems of the traditional equipment and currently-emerging equipment are solved, the tapping accuracy is effectively improved, the production cost is reduced, and the production and machining efficiency is increased. The fully-automatic tapping machine has a compact and reasonable structure and is convenient to operate and control, a plurality of fully-automatic tapping machines can be simultaneously managed by one person during use, and the machining efficiency is several times higher than that of the traditional tapping machine; and the machining accuracy is high, and the service effect is good, thus the fully-automatic tapping machine is worthy of popularization and application.